What are Computer Viruses?
If one is anxious to know what is a computer virus it is for certain that he might get a lot of answers which might appear to be complex. However the case is different in reality... There are certain basic issues involved in understanding the issue on what is a computer virus. A computer virus is a self-replicating computer program that behaves like a biological virus. It spreads by inserting copies into other executable code or documents.
Similiarly like the biological virus it spreads on its own by multiplying itself throughout the system, just like the biological virus that spreads by inserting itself into living cells. There are different types of viruses. Some of the prominent ones are Trojan horses, worms, and email viruses. The Trojan horses are computer programs which pretend to do one thing but actually do damage when they start it. The worms viruses are pieces of software that use computer networks and security flaws to create copies of itself. A cop y of the worm will then scan the network for any other machine that has a specific security flaw, and then replicate itself to the new machine. With regards to email viruses, these use email messages, and usually will copy and automatically mail itself to hundreds of people. There are two generalities of viruses, including resident and nonresident viruses. Resident viruses are those viruses that contain a specific replication module which is alarmingly similar to t hose employed by nonresident viruses. A resident virus is one that stays in memory after it executes, and even after its host program is executed. Resident viruses are often subdivided into categories like fast infectors, and slow infectors. Fast infectors are those particular viruses which are designed to affect as many files as possible and slow infectors are designed to infect hosts infrequently. For instance some slow infectors will only infect files when they are copied. Nonresident viruses on the other hand are those viru ses which consist of a finder module and a replication module. The finder module is responsible for finding new files to infect, while the replication module is the component that actually infects the found files. In the case of simpler viruses, what basically happens is that the replication module opens a new file, checks to see if the executable file has already been infected, appends the virus code to the executable file and saves the executable's starting point. It changes the executable's starting point so that it points to the start location of the newly copied virus code, saves the old start location so that the virus will move to that location immediately after its execution and then save the changes to the old executable file. Finally it closes the infected file and returns to the finder so that it can find even more files for the replication module
The History Of Computer Viruses
If you have been wondering on issues like what is computer virus, what are computer viruses, and where do computer viruses come from, the actual fact is that viruses have been around for longer than most people think.
In fact, the first PC virus was created in 1986. This is popularly called 'Brain' virus, and was written in Pakistan. This particular virus was a boot-sector virus, as it could only infect the boot records and not hard drives. It would occupy the unused space on the disk so that it could not be used, and as well as be able to hide itself from detectio n. The reason is that it would display the original and uninfected boot sector when a user tried to view the infected space on the disk.It was in 1987 that the Lehigh virus was established, and it was first discovered at Lehigh University, hence the reason for its title. This was in fact the first memory resident file infector. They attack executable files. In March 1998 the first anti-virus was written, and it was originally designed to detect and remove the Brain virus. This was made possible by immunizing against the Brain infect ion as well.The questions of what is a computer virus, what are computer viruses, when is a computer subject to infection by a virus, and why do people create computer viruses can not be answered simply, as there are many explanations and reasons for all of these. There are a number of different reasons as to why virus writers create these viruses. Some of them are research projects, pranks, vandalism, to attack the products of certain companies, to dis tribute political messages, for financial gain from identity theft, spyware, and cryptoviral extortion. However there are also some viruses that are intended to be good, as they help in improvement to the programs. It should also be known and remembered that a poorly-written good virus can still turn bad, as it may misidentify its target file and then result in deleting an innocent system file by mistake.
Thursday, November 15, 2007
Stop Internet Worms Before They Stop Your System
Stop Internet Worms Before They Stop Your System
Computer worms are viruses that attack and infect computer systems. If one were asked to define worm virus, the response is that they are reproducing programs that can run independently and can travel across network connections at an incredibly rapid pace. Although computer worms are a type of computer virus in themselves, when compared to the basic type of computer virus there are certain differences,
such as the fact that the method in which they reproduce and spread is quite different, and this difference is highly significant and important to be taken into consideration. There are l different types of the worm virus. There is an incredibly lengthy list of all computer viruses worms, including email worms, instant messaging worms, Internet worms, IRC worms, and file-sharing network worms. Each separate worm virus is different and has its own way of coming about and affecting the computer system and it is incredibly important to be info rmed on the different types of computer worms. The reason is that you are able to gain knowledge on the subject and if your computer happens to be infected by any of these computer virus and worms you will be aware of the proper steps to get rid of them. Email internet worms are by far the most common type of worms and virus and computer viruses and worms, and these spread through email messages. What usually happens here is that there is an attachment or link that is sent in the email, and once the recipient opens the attachment or link the virus executes and then will begin attacking the computer system.Instant messaging worm internet viruses work basically identically like email worm viruses. However these are instead spread over an online messaging service, such as ICQ, MSN, AOL, or Yahoo Messenger. Internet worms are even worse than worm viruses, as these will be able to scan network resources and will even scan the Internet for vulnerable computer systems, and then attack. In IRC worms, w orm viruses which primarily have chat channels as their main target, too spread by sending infected files or links to websites and vulnerable computer systems. However this type of worm virus is less effective because it is easier to notice and therefore easier to prevent. Finally, with regards to file-sharing networks worm viruses, these work by copying themselves to a shared folder, which is most likely located on the local machine.
How To Prevent Computer Worms
There are many steps you can to attempt to try and protect yourself from computer viruses, even those other than worm viruses, such as Trojan virus worm, which is one of the most common types of computer viruses.
One of the most important and simplest ways of preventing your computer from getting a virus is by being incredibly careful with the emails you receive and the attachments and links that you open. If you are not expecting one, and/or you do not know who it is from, then the best idea is to simply delete it and not worry about it.. If it was important and you somehow missed that then odds are they will write you again, and if it was a virus it will not resend itself soon. Another method is to constantly obtain Windows security updates, as these will make sure that your computer is up-to-dated with the newest and most technologically advanced antivirus methods. Remember to frequently check to see if the virus scanner software is installed correctly on your compu ter as many times as may be possible. Computer users simply assume that it is and that they are being protected when really it is not even installed correctly and therefore is doing no good. Continuously install the most recent antivirus software, checking for updates for this regularly as well. Using antivirus software is the best is an excellent idea, although never go for something simply because it is popular, but rather know about it from your friends and family members as to why it is beneficial and how the software actually works. Always let so meone know when you are planning to send them an email, especially if it contains links or attachments, so that they will be expecting it and will not have to worry that there is a virus which will spread to their computer system. Remember that simply knowing the sender is truly no proof and they may well be infected. Many of them have spoiled lots of valuable data and business activities. Therefore be careful when dealing with them..
Computer worms are viruses that attack and infect computer systems. If one were asked to define worm virus, the response is that they are reproducing programs that can run independently and can travel across network connections at an incredibly rapid pace. Although computer worms are a type of computer virus in themselves, when compared to the basic type of computer virus there are certain differences,
such as the fact that the method in which they reproduce and spread is quite different, and this difference is highly significant and important to be taken into consideration. There are l different types of the worm virus. There is an incredibly lengthy list of all computer viruses worms, including email worms, instant messaging worms, Internet worms, IRC worms, and file-sharing network worms. Each separate worm virus is different and has its own way of coming about and affecting the computer system and it is incredibly important to be info rmed on the different types of computer worms. The reason is that you are able to gain knowledge on the subject and if your computer happens to be infected by any of these computer virus and worms you will be aware of the proper steps to get rid of them. Email internet worms are by far the most common type of worms and virus and computer viruses and worms, and these spread through email messages. What usually happens here is that there is an attachment or link that is sent in the email, and once the recipient opens the attachment or link the virus executes and then will begin attacking the computer system.Instant messaging worm internet viruses work basically identically like email worm viruses. However these are instead spread over an online messaging service, such as ICQ, MSN, AOL, or Yahoo Messenger. Internet worms are even worse than worm viruses, as these will be able to scan network resources and will even scan the Internet for vulnerable computer systems, and then attack. In IRC worms, w orm viruses which primarily have chat channels as their main target, too spread by sending infected files or links to websites and vulnerable computer systems. However this type of worm virus is less effective because it is easier to notice and therefore easier to prevent. Finally, with regards to file-sharing networks worm viruses, these work by copying themselves to a shared folder, which is most likely located on the local machine.
How To Prevent Computer Worms
There are many steps you can to attempt to try and protect yourself from computer viruses, even those other than worm viruses, such as Trojan virus worm, which is one of the most common types of computer viruses.
One of the most important and simplest ways of preventing your computer from getting a virus is by being incredibly careful with the emails you receive and the attachments and links that you open. If you are not expecting one, and/or you do not know who it is from, then the best idea is to simply delete it and not worry about it.. If it was important and you somehow missed that then odds are they will write you again, and if it was a virus it will not resend itself soon. Another method is to constantly obtain Windows security updates, as these will make sure that your computer is up-to-dated with the newest and most technologically advanced antivirus methods. Remember to frequently check to see if the virus scanner software is installed correctly on your compu ter as many times as may be possible. Computer users simply assume that it is and that they are being protected when really it is not even installed correctly and therefore is doing no good. Continuously install the most recent antivirus software, checking for updates for this regularly as well. Using antivirus software is the best is an excellent idea, although never go for something simply because it is popular, but rather know about it from your friends and family members as to why it is beneficial and how the software actually works. Always let so meone know when you are planning to send them an email, especially if it contains links or attachments, so that they will be expecting it and will not have to worry that there is a virus which will spread to their computer system. Remember that simply knowing the sender is truly no proof and they may well be infected. Many of them have spoiled lots of valuable data and business activities. Therefore be careful when dealing with them..
Where To Find Free Antivirus Scans And Tools
Where To Find Free Antivirus Scans And Tools
There are different tools that can help computer users to beat viruses or at least help them prevent viruses to find and attach to computers. Free antivirus software is one of the best tools and although antivirus software programs
are quite common free antivirus software programs and free antivirus downloads are not well known. There are many free antivirus software in today's world and generally these come with many features as the ones that cost you money.. Some do not come with the same quality features. The manufacturer of those free antivirus downloads or free antivirus programs usually do their best to make sure that you have everything you need with your software.
How Effective Are Online Virus Scams?
Online virus scams are incredibly effective which is actually rather surprising considering how long computers and the Internet have been around and how long computer users across the world have known about computer viruses, their dangers, and how easy they are spread from one computer to another.
Where Can I Find Free Antivirus Software?
The Internet is an incredibly useful tool if you are searching for any type of antivirus freeware. This includes everything from a free antivirus scan, to free antivirus so f tware, free antivirus packages to a free antivirus scanner.. You can find any type of antivirus device, program, or piece of software that you require. The catch is that you can make out this information at free of cost.. The incredible speed and the efficiency allow you to browse quickly and easily through a multitude of options... It allows you to select the choice that is best for you. Similiarly you must also keep your personal preferences, and your needs in mind and then take a decision based on these. Avast is the most commonly known and used piece of antivirus software that is offered freely. Similarly it has options whereby you can avail the most features and benefits, at no price whatsoever. Avast! 4 which is a Home Edition is also the free version of a full-featured antivirus package designed exclusively for both home users and non-commercial use. Some of the features offered with this package are antivirus, kernel, simple user interface, resident protection, P2P and IM shields, ne tw ork shield, web shield, automatic updates, virus chest, system integration, integrated virus cleaner, support for 64-bit Windows, and internalization. The antivirus kennel that is offered here features many incredulous qualities such as outstanding virus detection abilities and overall high performance. The purpose of the simple user interface is to allow easy access and use without undermining the skill of the user and is used to start on-demand scanning and work with the results and change various options as well. The overall appearance of the interface is typically quite flexible and usually supports skins. As for as standard resident protection is considered this is one of the most important part of any antivirus program, and it contains a file system protection program which positively enables and ensures that no virus will be started on the computer... This feature also helps to detect against new and unknown viruses. With regards to P2P and IM shields the purpose of these is to pr ote ct IM (instant messaging) services such as ICQ, MSN, AOL, and Yahoo Messenger, and P2P (peer-to-peer) programs.
The network shield is used to provide protection against Internet viruses and worms as it analyses all network traffic and then scans looking for malicious content. The web shield is used to monitor and filter all HTTP traffic coming from web sites on the Internet and the automatic updates are used to automatically update whenever any updates are available for your antivirus program.The virus chest is a sort of folder on your disk drive on your computer which keeps files safe. If in case your computer gets a virus these particular files would still remain safe. The system integration allows for a thorough and deep scan of the computer. This happens when you search for viruses or malicious content. The virus cleaner is used to clean viruses from the computer. Supportive of Windows is helpful because this is basically a necessity for any antivirus software and the internalization factor is als o an important factor because it allows the support of foreign languages. Some of the present ones include English, Bulgarian, Czech, Dutch, Finnish, French, German, Hungarian, Italian, Norwegian, Korean, Polish, Portuguese, Japanese, Romanian, Russian, Serbian, Slovak, Spanish, and Turkish. However now there are lot of attempts to bring more languages under this and it is believed that these efforts will reap soon.
There are different tools that can help computer users to beat viruses or at least help them prevent viruses to find and attach to computers. Free antivirus software is one of the best tools and although antivirus software programs
are quite common free antivirus software programs and free antivirus downloads are not well known. There are many free antivirus software in today's world and generally these come with many features as the ones that cost you money.. Some do not come with the same quality features. The manufacturer of those free antivirus downloads or free antivirus programs usually do their best to make sure that you have everything you need with your software.
How Effective Are Online Virus Scams?
Online virus scams are incredibly effective which is actually rather surprising considering how long computers and the Internet have been around and how long computer users across the world have known about computer viruses, their dangers, and how easy they are spread from one computer to another.
Where Can I Find Free Antivirus Software?
The Internet is an incredibly useful tool if you are searching for any type of antivirus freeware. This includes everything from a free antivirus scan, to free antivirus so f tware, free antivirus packages to a free antivirus scanner.. You can find any type of antivirus device, program, or piece of software that you require. The catch is that you can make out this information at free of cost.. The incredible speed and the efficiency allow you to browse quickly and easily through a multitude of options... It allows you to select the choice that is best for you. Similiarly you must also keep your personal preferences, and your needs in mind and then take a decision based on these. Avast is the most commonly known and used piece of antivirus software that is offered freely. Similarly it has options whereby you can avail the most features and benefits, at no price whatsoever. Avast! 4 which is a Home Edition is also the free version of a full-featured antivirus package designed exclusively for both home users and non-commercial use. Some of the features offered with this package are antivirus, kernel, simple user interface, resident protection, P2P and IM shields, ne tw ork shield, web shield, automatic updates, virus chest, system integration, integrated virus cleaner, support for 64-bit Windows, and internalization. The antivirus kennel that is offered here features many incredulous qualities such as outstanding virus detection abilities and overall high performance. The purpose of the simple user interface is to allow easy access and use without undermining the skill of the user and is used to start on-demand scanning and work with the results and change various options as well. The overall appearance of the interface is typically quite flexible and usually supports skins. As for as standard resident protection is considered this is one of the most important part of any antivirus program, and it contains a file system protection program which positively enables and ensures that no virus will be started on the computer... This feature also helps to detect against new and unknown viruses. With regards to P2P and IM shields the purpose of these is to pr ote ct IM (instant messaging) services such as ICQ, MSN, AOL, and Yahoo Messenger, and P2P (peer-to-peer) programs.
The network shield is used to provide protection against Internet viruses and worms as it analyses all network traffic and then scans looking for malicious content. The web shield is used to monitor and filter all HTTP traffic coming from web sites on the Internet and the automatic updates are used to automatically update whenever any updates are available for your antivirus program.The virus chest is a sort of folder on your disk drive on your computer which keeps files safe. If in case your computer gets a virus these particular files would still remain safe. The system integration allows for a thorough and deep scan of the computer. This happens when you search for viruses or malicious content. The virus cleaner is used to clean viruses from the computer. Supportive of Windows is helpful because this is basically a necessity for any antivirus software and the internalization factor is als o an important factor because it allows the support of foreign languages. Some of the present ones include English, Bulgarian, Czech, Dutch, Finnish, French, German, Hungarian, Italian, Norwegian, Korean, Polish, Portuguese, Japanese, Romanian, Russian, Serbian, Slovak, Spanish, and Turkish. However now there are lot of attempts to bring more languages under this and it is believed that these efforts will reap soon.
Patches and Service Packs: Necessities To Prevent Viruses
Patches and Service Packs: Necessities To Prevent Viruses
Service packs are the products through which product updates are distributed, and these may contain more updates with regards to system reliability, product compatibility, security and more.
Basically a service pack is a collection of updates for your computer, and enhancements to a software program, which are all delivered in the form of a single and installable package. There are many companies which offer these service packs and these can be classified either as incremental which means that they only contain the updates that were not present in previous packs or they can be classified as cumulative, which means that they include all the contents from their predecessors. With regards to the service packs vs security patches, this issue can only be decided once both factors are completely and thoroughly understood.
What Are Security Patches?
With regards to the issue of service packs vs security patches this can be decided onc e both service packs and security patches have been completely understood. A security patch is a small piece of software which is specifically designed to be able to update or fix problems with your computer system or program, and this includes everything from fixing bugs to replacing graphics and it can also include performance like any other computer system. The actual size of a security patch will vary but in particular they will be larger when the changes add or replace a non-program data... Security and software patches are considered to play the most important role with regards to fixing security holes, and are essential to any proper computer system. Therefore, when it comes to the matter of trying to decide between service packs vs security patches the answer lies in the purpose for which you need them.
Are These Methods Effective In Preventing Attacks?
Both service packs and security patches are incredibly useful and helpful in preventing attacks. Each obviously helps in its own separat e way and by using its own separate means and methods. Some of the options in these regards include microsoft security patches, microsoft software patches, windows security patches, windows 2000 security patches, windows xp security patch, and web app lication vulnerabilities and patch management. The Windows XP security patch is a free update that is available which offers enhancements and which is considered as the best possible protection against viruses, hackers, and worms.
Preventing Viruses
The best method is of course prevention, and so it is pretty essential that you understand the basics of each and every virus, so that you know them.
The best ways to prevent your computer from getting a virus are actually simple, including continuously installing the latest version of your antivirus program, to make sure that your computer is up-to-date with the latest technological antivirus advances. You should always keep up with your operating system updates and remember to exercise reasonable cauti on whenever you are opening email attachments, as these are one of the most primary ways for viruses to spread on computers. Even if the email is from someone you know, you should still take the proper precautions, especially if there is an attach ment that was sent with the email itself and if it is suspiscious.
It is not necessary to keep the file sharing option on your computer. Rather you must always have it turned off. As long as you have file and printer sharing your computer system is much more vulnerable to all sorts of viruses and intrusions, and you need to remember to take all of these procedures incredibly seriously, and although antivirus software will generally fend off any possible viruses, it is still extremely necessary to maintain consistent use of all of other methods and means to keep your computer as safe and secure as possible. One of the reasons for viruses on computers is because people do not check regularly to see if their antivirus software is installed proper ly. This means they believe they are being protected from viruses while they actually are not and this can quite obviously lead to serious problems. Therefore, you should make it an issue to frequently check to make sure that any antivirus so ftware programs that you have on your computer are installed and working properly.. Using all these methods will help you to keep safe from viruses.
Service packs are the products through which product updates are distributed, and these may contain more updates with regards to system reliability, product compatibility, security and more.
Basically a service pack is a collection of updates for your computer, and enhancements to a software program, which are all delivered in the form of a single and installable package. There are many companies which offer these service packs and these can be classified either as incremental which means that they only contain the updates that were not present in previous packs or they can be classified as cumulative, which means that they include all the contents from their predecessors. With regards to the service packs vs security patches, this issue can only be decided once both factors are completely and thoroughly understood.
What Are Security Patches?
With regards to the issue of service packs vs security patches this can be decided onc e both service packs and security patches have been completely understood. A security patch is a small piece of software which is specifically designed to be able to update or fix problems with your computer system or program, and this includes everything from fixing bugs to replacing graphics and it can also include performance like any other computer system. The actual size of a security patch will vary but in particular they will be larger when the changes add or replace a non-program data... Security and software patches are considered to play the most important role with regards to fixing security holes, and are essential to any proper computer system. Therefore, when it comes to the matter of trying to decide between service packs vs security patches the answer lies in the purpose for which you need them.
Are These Methods Effective In Preventing Attacks?
Both service packs and security patches are incredibly useful and helpful in preventing attacks. Each obviously helps in its own separat e way and by using its own separate means and methods. Some of the options in these regards include microsoft security patches, microsoft software patches, windows security patches, windows 2000 security patches, windows xp security patch, and web app lication vulnerabilities and patch management. The Windows XP security patch is a free update that is available which offers enhancements and which is considered as the best possible protection against viruses, hackers, and worms.
Preventing Viruses
The best method is of course prevention, and so it is pretty essential that you understand the basics of each and every virus, so that you know them.
The best ways to prevent your computer from getting a virus are actually simple, including continuously installing the latest version of your antivirus program, to make sure that your computer is up-to-date with the latest technological antivirus advances. You should always keep up with your operating system updates and remember to exercise reasonable cauti on whenever you are opening email attachments, as these are one of the most primary ways for viruses to spread on computers. Even if the email is from someone you know, you should still take the proper precautions, especially if there is an attach ment that was sent with the email itself and if it is suspiscious.
It is not necessary to keep the file sharing option on your computer. Rather you must always have it turned off. As long as you have file and printer sharing your computer system is much more vulnerable to all sorts of viruses and intrusions, and you need to remember to take all of these procedures incredibly seriously, and although antivirus software will generally fend off any possible viruses, it is still extremely necessary to maintain consistent use of all of other methods and means to keep your computer as safe and secure as possible. One of the reasons for viruses on computers is because people do not check regularly to see if their antivirus software is installed proper ly. This means they believe they are being protected from viruses while they actually are not and this can quite obviously lead to serious problems. Therefore, you should make it an issue to frequently check to make sure that any antivirus so ftware programs that you have on your computer are installed and working properly.. Using all these methods will help you to keep safe from viruses.
Destructive And Popular Email Viruses
Destructive And Popular Email Viruses
What Are Email Viruses?
Email viruses are viruses which can infect your computer simply through the reading or in some cases even the previewing of email messages. Email viruses work by spreading around through email messages, and they usually replicate
themselves by automatically mailing themselves to dozens of people in the victim's email address book. There are several other different types of computer viruses, including that of computer viruses through email, however email viruses are separate from all of these other viruses in several particular ways. For instance, when comparing email viruses to that of worms, the differences are remarkable and incredibly significant.Worms are pieces of software that use that of computer networks and security holes to replicate themselves, and they work because after the worm has replicated itself, a copy of it will then scan the network for any another machine that has a security hole, and if it finds one, it will then copy itself to this new mac hine, and will then start replicating from there as well.
How To Prevent Email Viruses
There are many steps that you can take if you are looking to stop email viruses, and you can obviously never be absolutely sure that any of these methods will work. Taking the proper precautionary steps is essential to protecting and securing your computer and your privacy. The best way to stop email viruses or to go about avoiding email viruses altogether would be to use the proper safety measures whenever you receive an email, especially if you weren't expecting it. Typically, if you receive an email from someone - even if you know the person- and you were not expecting it, you should simply delete it, especially if there is an attachment that came with the email itself. Never open the attachment to see what it is, for even if you know the person who sent the email, their computer may be infected with a virus and they may not even realize it, and so there is no point in taking that risk if you don't have to. Email computer viruses are incredibly popular, including hoaxes email viruses, many of which have been rather notorious in their own time. Creating email viruses is a dangerous and illegal crime. It is then quite obviously that they send fake email viruses. There are in fact an incredible amount of hoax virus warnings that are presently circulating around through email.
In order to determine whether or not a virus that you hear is a hoax, you can check out the Computer Incident Advisory Capability Site, which is a website that is sponsored by the U.S. Department of Energy, and which is used to truthfully tell you whether or not a particular virus threat is a hoax or not. A good way to prevent any of this from happening to you is by installing the most recent and best quality antivirus software on your computer.You should also learn how to understand the nature of an attachment, as any executable type of attachment has the potential to be infected. The best idea here is to make sure that you have file extension viewing enabled. This is especially if you are using client software like MS Outlook to download the mail to your PC. Also, you will want to patch your system. In fact it should be known that Microsoft routinely releases approximate ly 10 security patches in a single year, and they also offer a Windows update site, which is able to automatically scan your system and provide a list of any recommended updates that are available for your computer system. Antivirus software is an essential factor involved to keep your computer safe from viruses and hackers. Any properly configured antivirus program will be able to intercept and deactivate known email viruses which are contained in the emails you receive. However, even with the widespread use of antivirus software, there still is an incredible number of computer users who are frequently infected with viruses of sorts, which begs the question of how this could be. Basically, regardless of how quickly antivirus vendors work to cre ate new and more technologically advanced software, the new threats traveling via email are created my thousand virus writers with programs to do it faster these are much faster than these vendors. This is why no matter how fast or hard these antivirus v endors work, they will truly never be able to keep up with the ever increasing and constantly advancing virus threats. If you do get a virus from an infected file, there are several things that you should remember to do including: inform the person that you originally got the infected file from, inform all the people who have access to the file on the network, and as well, remember to inform anyone that you may have happened to email the infected file to; this will stop the cycle rather than having the virus continue to spread.
What Are Email Viruses?
Email viruses are viruses which can infect your computer simply through the reading or in some cases even the previewing of email messages. Email viruses work by spreading around through email messages, and they usually replicate
themselves by automatically mailing themselves to dozens of people in the victim's email address book. There are several other different types of computer viruses, including that of computer viruses through email, however email viruses are separate from all of these other viruses in several particular ways. For instance, when comparing email viruses to that of worms, the differences are remarkable and incredibly significant.Worms are pieces of software that use that of computer networks and security holes to replicate themselves, and they work because after the worm has replicated itself, a copy of it will then scan the network for any another machine that has a security hole, and if it finds one, it will then copy itself to this new mac hine, and will then start replicating from there as well.
How To Prevent Email Viruses
There are many steps that you can take if you are looking to stop email viruses, and you can obviously never be absolutely sure that any of these methods will work. Taking the proper precautionary steps is essential to protecting and securing your computer and your privacy. The best way to stop email viruses or to go about avoiding email viruses altogether would be to use the proper safety measures whenever you receive an email, especially if you weren't expecting it. Typically, if you receive an email from someone - even if you know the person- and you were not expecting it, you should simply delete it, especially if there is an attachment that came with the email itself. Never open the attachment to see what it is, for even if you know the person who sent the email, their computer may be infected with a virus and they may not even realize it, and so there is no point in taking that risk if you don't have to. Email computer viruses are incredibly popular, including hoaxes email viruses, many of which have been rather notorious in their own time. Creating email viruses is a dangerous and illegal crime. It is then quite obviously that they send fake email viruses. There are in fact an incredible amount of hoax virus warnings that are presently circulating around through email.
In order to determine whether or not a virus that you hear is a hoax, you can check out the Computer Incident Advisory Capability Site, which is a website that is sponsored by the U.S. Department of Energy, and which is used to truthfully tell you whether or not a particular virus threat is a hoax or not. A good way to prevent any of this from happening to you is by installing the most recent and best quality antivirus software on your computer.You should also learn how to understand the nature of an attachment, as any executable type of attachment has the potential to be infected. The best idea here is to make sure that you have file extension viewing enabled. This is especially if you are using client software like MS Outlook to download the mail to your PC. Also, you will want to patch your system. In fact it should be known that Microsoft routinely releases approximate ly 10 security patches in a single year, and they also offer a Windows update site, which is able to automatically scan your system and provide a list of any recommended updates that are available for your computer system. Antivirus software is an essential factor involved to keep your computer safe from viruses and hackers. Any properly configured antivirus program will be able to intercept and deactivate known email viruses which are contained in the emails you receive. However, even with the widespread use of antivirus software, there still is an incredible number of computer users who are frequently infected with viruses of sorts, which begs the question of how this could be. Basically, regardless of how quickly antivirus vendors work to cre ate new and more technologically advanced software, the new threats traveling via email are created my thousand virus writers with programs to do it faster these are much faster than these vendors. This is why no matter how fast or hard these antivirus v endors work, they will truly never be able to keep up with the ever increasing and constantly advancing virus threats. If you do get a virus from an infected file, there are several things that you should remember to do including: inform the person that you originally got the infected file from, inform all the people who have access to the file on the network, and as well, remember to inform anyone that you may have happened to email the infected file to; this will stop the cycle rather than having the virus continue to spread.
Protect Your Information From Viruses
Protect Your Information From Viruses
The term computer virus can refer to different things, as there are separate types of computer viruses. Most of them must be taken into consideration with utmost seriousness. The most common types are viruses, email viruses, worms, and Trojan horses.
A virus is a piece of software that connects and attaches itself to certain programs and then uses this initiative to reproduce itself through computer system. Email viruses are those viruses which move around via email messages and who usually replicates by automatically mailing themselves to as many people as possible through the use of email messaging. Worms on the other hand, are small pieces of software, but these types of viruses work by computer networks and security holes to replicate themselves. Finally Trojan horses are those viruses which are computer programs, and which pretend to be one thing and then once you execute it you see that it is different and it can begin to attack and infect your compu ter system.
What Is Spyware And How Does It Help To Protect Your Privacy?
Spyware is a malicious software which is designed to intercept or take partial control of a computer's operation.. Basically it is a program that is able to watch what users are doing with their computers and can then send that information through Internet., Spyware consists of lots of computer programs that are able to attach themselves to your operating system in nefarious ways, and which can destroy the power of your computer's processing system.
Recent studies have shown that more than two-thirds of all personal computers are infected with some form of Spyware and that many times people will mistake Spyware for a computer virus of some sort. This can be a serious problem because the computer user may go about it the wrong way and enact the wrong methods to fight the problem. Therefore, it is essential to learn about the different types of computer viruses including Spyware, so that you will know a lot in the entire matter and as well as be able to determine whether the computer problem you are experiencing is a bug or virus or Spyware.
How To Prevent Spyware
There are many steps that you can take to prevent Spyware from attaching itself to your computer, and this should result in seriou s computer virus prevention at any cost. Even if the problem is not solved partially there is no big difference as computer viruses can multiply like human beings. You must learn how to prevent computer virus, as learning how to prevent computer viruses will be essential in the end. As previously discussed, you must also know many issues [pertaining to virus prevention, computer viruses prevention, anti virus guard, and free anti virus protection.
However this is only a generic classification and it should not be taken intotality.. The most common virus prevention with regards to Spyware is anti-Spyware programs, which are designed specifically to protect your computer from any Spyware that might have been attached to it. There are two basic ways that this anti-Spyware helps as far as computer virus prevention on combating Spyware is concerned. Real-time protection prevents the entire installation of Spyware, and as well as ensures the detection and removal of Spyware that is already present.
This form of computer virus prevention is highly effective and produces fantastic results, and generally people find that the detection and removal types. AntiSpyware software are the best option, as they are considered to be simpler. However there are also fake anti-Spyware programs, of which you should be cautious. Some of the known offenders are: Malware Wipe, Pest Trap, SpyAxe, AntiVirus Gold, Spyware Strike, SpyFalcon, WorldAntiSpy, WinFixer, SpyTrooper, Spy Sheriff, SpyBan, SpyWiper, PAL Spyware Stormer, PSGuard, AlfaCleaner. Other methods that are used to deter Spyware includes changing your web browser from Internet Explorer to Mozilla Firefox or Opera, as the latter two options are not targeted nearly as much as Internet Explorer because users on these two browsers are less vulnerable to Spyware.
Many Internet Service Providers have also improved. They have taken a particularly different approach for combating Spyware, such as using their network firewalls and web proxies to block acce ss to certain web sites which are commonly known to install Spyware.If you use Windows XP one method is useful for protecting against Spyware, and that is to make sure that all your Windows updates are kept updated frequently, as there are constantly new and improved Window programs and accessories that you must installl if you want your computer system to have the highest standard of security and protection possible.
The term computer virus can refer to different things, as there are separate types of computer viruses. Most of them must be taken into consideration with utmost seriousness. The most common types are viruses, email viruses, worms, and Trojan horses.
A virus is a piece of software that connects and attaches itself to certain programs and then uses this initiative to reproduce itself through computer system. Email viruses are those viruses which move around via email messages and who usually replicates by automatically mailing themselves to as many people as possible through the use of email messaging. Worms on the other hand, are small pieces of software, but these types of viruses work by computer networks and security holes to replicate themselves. Finally Trojan horses are those viruses which are computer programs, and which pretend to be one thing and then once you execute it you see that it is different and it can begin to attack and infect your compu ter system.
What Is Spyware And How Does It Help To Protect Your Privacy?
Spyware is a malicious software which is designed to intercept or take partial control of a computer's operation.. Basically it is a program that is able to watch what users are doing with their computers and can then send that information through Internet., Spyware consists of lots of computer programs that are able to attach themselves to your operating system in nefarious ways, and which can destroy the power of your computer's processing system.
Recent studies have shown that more than two-thirds of all personal computers are infected with some form of Spyware and that many times people will mistake Spyware for a computer virus of some sort. This can be a serious problem because the computer user may go about it the wrong way and enact the wrong methods to fight the problem. Therefore, it is essential to learn about the different types of computer viruses including Spyware, so that you will know a lot in the entire matter and as well as be able to determine whether the computer problem you are experiencing is a bug or virus or Spyware.
How To Prevent Spyware
There are many steps that you can take to prevent Spyware from attaching itself to your computer, and this should result in seriou s computer virus prevention at any cost. Even if the problem is not solved partially there is no big difference as computer viruses can multiply like human beings. You must learn how to prevent computer virus, as learning how to prevent computer viruses will be essential in the end. As previously discussed, you must also know many issues [pertaining to virus prevention, computer viruses prevention, anti virus guard, and free anti virus protection.
However this is only a generic classification and it should not be taken intotality.. The most common virus prevention with regards to Spyware is anti-Spyware programs, which are designed specifically to protect your computer from any Spyware that might have been attached to it. There are two basic ways that this anti-Spyware helps as far as computer virus prevention on combating Spyware is concerned. Real-time protection prevents the entire installation of Spyware, and as well as ensures the detection and removal of Spyware that is already present.
This form of computer virus prevention is highly effective and produces fantastic results, and generally people find that the detection and removal types. AntiSpyware software are the best option, as they are considered to be simpler. However there are also fake anti-Spyware programs, of which you should be cautious. Some of the known offenders are: Malware Wipe, Pest Trap, SpyAxe, AntiVirus Gold, Spyware Strike, SpyFalcon, WorldAntiSpy, WinFixer, SpyTrooper, Spy Sheriff, SpyBan, SpyWiper, PAL Spyware Stormer, PSGuard, AlfaCleaner. Other methods that are used to deter Spyware includes changing your web browser from Internet Explorer to Mozilla Firefox or Opera, as the latter two options are not targeted nearly as much as Internet Explorer because users on these two browsers are less vulnerable to Spyware.
Many Internet Service Providers have also improved. They have taken a particularly different approach for combating Spyware, such as using their network firewalls and web proxies to block acce ss to certain web sites which are commonly known to install Spyware.If you use Windows XP one method is useful for protecting against Spyware, and that is to make sure that all your Windows updates are kept updated frequently, as there are constantly new and improved Window programs and accessories that you must installl if you want your computer system to have the highest standard of security and protection possible.
Havoc Caused By Some Popular Boot And Trojan Viruses
Havoc Caused By Some Popular Boot And Trojan Viruses
A computer virus comes in many different forms. Some of the most common and well-known ones include virus, worm, Trojan horse, or email virus. They are specifically designed to cause harm to a computer system and spread themselves from one computer to another.
They interfere with computer operation, record, corrupt, or delete data, and generally slow down everything in the process. With the different computer viruses, it is incredibly important to be aware of how they work. It is also very important to maintain your computer with the latest updates and antivirus tools... Similarly it is also equally important to be updated about the recent threats. You must also follow ew basic rules while you are on the Internet. This helps in keeping your system safe and as well as ensures that it is not vulnerable.
Will My Antivirus Company Inform Me If There Are Any New Viruses?
With regards to whether or not your antivirus company will infor m you about the latest virus alerts, the answer to this basically depends on which antivirus company you choose . Sophos, for instance, is a company which makes security software with regards to spyware, antivirus, and anti-spam, and which also notifies the latest virus alerts to all users. .. They have four options t o choose from, and you can decide on a combination of two or more if you wish. The first option is IDE notification for new viruses in the wild, which is based on the idea that whenever a new virus identity or virus alert is placed on their website, they will notify l users about the software programs of that particular virus alert.
What Is Malware?
The term malware refers to all types of malicious software, designed to infiltrate or damage a computer system. All types of computer viruses such as worms, email viruses, and Trojan horses, are categorized as being malware, and most of the programs included in this are designed to vandalize or cause serious data loss, often causing tot al failure to the entire computer system.. The best known types of malware are viruses and worms, as these two are known for the manner in which they spread. The term malware includes spyware ,adware programs and tracking cookies which are used to monitor your surfing habits. Basically any type of program used for monitoring and collecting of personal information, and disrupting or damaging your computer, is referred to as malware. Therefore, the entire purpose of antivirus programs is to combat against this malware, as they can be configured to scan your email for malicious or suspicious code, and will then immediately alert you about its presence.
Websites That Provide Information On Malware
There are many websites available to day that provides vital information on malware. You can also surf for more related information. Some of the additional information that you have to look search in the internet includes virus alert, computer virus alerts, bogus virus alerts, and new virus alerts.
Wikiped iais a notorious website, which is an online encyclopedia that offers information on a multitude of subjects, including malware.They offer lots of crucial information on malware. If you go through all of them in detail you will be able to get full details and as well as be able to know the intricacies. Wikipedia offers an incredulous amount of information on the subject of malware, which is easy to read and understand. No doubt they have lots of practical applicability and relevance. You should not restrict to wikepedia alone. There are lots of online resources that can help you in this regard. You only have to go to a search engine and then type Malware.Another website that is generous in offering information on the issue of malware is ars technica, whose site describes malware and the steps that you can take to prevent it. They discuss on how malware is considered to be one of the biggest threats to computer users, as it can hijack your browser, redirect your search attempts, serve up nasty an dannoying pop-up ads, track all of the websites you visit, and cause you a lot of unnecessary hassle. They also offer information on important topics, such as the best antivirus programs you can get, the different types of malware - including adware, spyware, hijackers, toolbars, and dialers - as well as the m ost common examples of malware. This site is incredibly useful for learning about malware, and is an incredibly efficient resource for anyone who wants to find out more information on the subject.
A computer virus comes in many different forms. Some of the most common and well-known ones include virus, worm, Trojan horse, or email virus. They are specifically designed to cause harm to a computer system and spread themselves from one computer to another.
They interfere with computer operation, record, corrupt, or delete data, and generally slow down everything in the process. With the different computer viruses, it is incredibly important to be aware of how they work. It is also very important to maintain your computer with the latest updates and antivirus tools... Similarly it is also equally important to be updated about the recent threats. You must also follow ew basic rules while you are on the Internet. This helps in keeping your system safe and as well as ensures that it is not vulnerable.
Will My Antivirus Company Inform Me If There Are Any New Viruses?
With regards to whether or not your antivirus company will infor m you about the latest virus alerts, the answer to this basically depends on which antivirus company you choose . Sophos, for instance, is a company which makes security software with regards to spyware, antivirus, and anti-spam, and which also notifies the latest virus alerts to all users. .. They have four options t o choose from, and you can decide on a combination of two or more if you wish. The first option is IDE notification for new viruses in the wild, which is based on the idea that whenever a new virus identity or virus alert is placed on their website, they will notify l users about the software programs of that particular virus alert.
What Is Malware?
The term malware refers to all types of malicious software, designed to infiltrate or damage a computer system. All types of computer viruses such as worms, email viruses, and Trojan horses, are categorized as being malware, and most of the programs included in this are designed to vandalize or cause serious data loss, often causing tot al failure to the entire computer system.. The best known types of malware are viruses and worms, as these two are known for the manner in which they spread. The term malware includes spyware ,adware programs and tracking cookies which are used to monitor your surfing habits. Basically any type of program used for monitoring and collecting of personal information, and disrupting or damaging your computer, is referred to as malware. Therefore, the entire purpose of antivirus programs is to combat against this malware, as they can be configured to scan your email for malicious or suspicious code, and will then immediately alert you about its presence.
Websites That Provide Information On Malware
There are many websites available to day that provides vital information on malware. You can also surf for more related information. Some of the additional information that you have to look search in the internet includes virus alert, computer virus alerts, bogus virus alerts, and new virus alerts.
Wikiped iais a notorious website, which is an online encyclopedia that offers information on a multitude of subjects, including malware.They offer lots of crucial information on malware. If you go through all of them in detail you will be able to get full details and as well as be able to know the intricacies. Wikipedia offers an incredulous amount of information on the subject of malware, which is easy to read and understand. No doubt they have lots of practical applicability and relevance. You should not restrict to wikepedia alone. There are lots of online resources that can help you in this regard. You only have to go to a search engine and then type Malware.Another website that is generous in offering information on the issue of malware is ars technica, whose site describes malware and the steps that you can take to prevent it. They discuss on how malware is considered to be one of the biggest threats to computer users, as it can hijack your browser, redirect your search attempts, serve up nasty an dannoying pop-up ads, track all of the websites you visit, and cause you a lot of unnecessary hassle. They also offer information on important topics, such as the best antivirus programs you can get, the different types of malware - including adware, spyware, hijackers, toolbars, and dialers - as well as the m ost common examples of malware. This site is incredibly useful for learning about malware, and is an incredibly efficient resource for anyone who wants to find out more information on the subject.
Antivirus software
Antivirus software
Antivirus" redirects here. For antiviral medication, see antiviral drug.
Antivirus software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware).
Antivirus software typically uses two different techniques to accomplish this:
Examining (scanning) files to look for known viruses matching definitions in a virus dictionary
Identifying suspicious behavior from any computer program which might indicate infection. Such analysis may include data captures, port monitoring and other methods.
Approaches
Dictionary
In the virus dictionary approach, when the antivirus software looks at a file, it refers to a dictionary of known viruses that the authors of the antivirus software have identified. If a piece of code in the file matches any virus identified in the dictionary, then the antivirus software can take one of the following actions:
attempt to repair the file by removing the virus itself from the file
quarantine the file (such that the file remains inaccessible to other programs and its virus can no longer spread)
delete the infected file
To achieve consistent success in the medium and long term, the virus dictionary approach requires periodic (generally online) downloads of updated virus dictionary entries. As civically minded and technically inclined users identify new viruses "in the wild", they can send their infected files to the authors of antivirus software, who then include information about the new viruses in their dictionaries.
Dictionary-based antivirus software typically examines files when the computer's operating system creates, opens, closes or e-mails them. In this way it can detect a known virus immediately upon receipt. Note too that a System Administrator can typically schedule the antivirus software to examine (scan) all files on the computer's hard disk on a regular basis.
Although the dictionary approach can effectively contain virus outbreaks in the right circumstances, virus authors have tried to stay a step ahead of such software by writing "oligomorphic", "polymorphic" and more recently "metamorphic" viruses, which encrypt parts of themselves or otherwise modify themselves as a method of disguise, so as to not match the virus's signature in the dictionary.
Suspicious behavior
The suspicious behavior approach, by contrast, doesn't attempt to identify known viruses, but instead monitors the behavior of all programs. If one program tries to write data to an executable program, for example, the antivirus software can flag this suspicious behavior, alert a user and ask what to do.
Unlike the dictionary approach, the suspicious behavior approach therefore provides protection against brand-new viruses that do not yet exist in any virus dictionaries. However, it can also sound a large number of false positives, and users probably become desensitized to all the warnings. If the user clicks "Accept" on every such warning, then the antivirus software obviously gives no benefit to that user. This problem has worsened since 1997[citation needed], since many more nonmalicious program designs came to modify other .exe files without regard to this false positive issue. Thus, most modern antivirus software uses this technique less and less.
Other approaches
Some antivirus software use other types of heuristic analysis. For example, it could try to emulate the beginning of the code of each new executable that the system invokes before transferring control to that executable. If the program seems to use self-modifying code or otherwise appears as a virus (if it immediately tries to find other executables, for example), one could assume that a virus has infected the executable. However, this method could result in a lot of false positives.
Yet another detection method involves using a sandbox. A sandbox emulates the operating system and runs the executable in this simulation. After the program has terminated, software analyzes the sandbox for any changes which might indicate a virus. Because of performance issues, this type of detection normally only takes place during on-demand scans. Also this method may fail as viruses can be nondeterministic and result in different actions or no actions at all done when run - so it will be impossible to detect it from one run.
Some virus scanners can also warn a user if a file is likely to contain a virus based on the file type.
An emerging technique to deal with malware in general is whitelisting. Rather than looking for only known bad software, this technique prevents execution of all computer code except that which has been previously identified as trustworthy by the system administrator. By following this default deny approach, the limitations inherent in keeping virus signatures up to date are avoided. Additionally, computer applications that are unwanted by the system administrator are prevented from executing since they are not on the whitelist. Since modern enterprise organizations have large quantities of trusted applications, the limitations of adopting this technique rest with the system administrators' ability to properly inventory and maintain the whitelist of trusted applications. As such, viable implementations of this technique include tools for automating the inventory and whitelist maintenance processes.
Issues of concern
The ongoing writing and spreading of viruses and of panic about them gives the vendors of commercial antivirus software a financial interest in the ongoing existence of viruses. Some theorize that antivirus companies have financial ties to virus writers, to generate their own market, though there is no evidence for this.
Some antivirus software can considerably reduce performance. Users may disable the antivirus protection to overcome the performance loss, thus increasing the risk of infection. For maximum protection the antivirus software needs to be enabled all the time — often at the cost of slower performance (see also software bloat).
It is important to note that one should not have more than one antivirus software installed on a single computer at any given time. This can seriously cripple the computer and cause further damage.
It is sometimes necessary to temporarily disable virus protection when installing major updates such as Windows Service Packs or updating graphics card drivers.[citation needed] Having antivirus protection running at the same time as installing a major update may prevent the update installing properly or at all.
When purchasing antivirus software, the agreement may include a clause that your subscription will be automatically renewed, and your credit card automatically billed at the renewal time without your approval. For example, McAfee requires one to unsubscribe at least 60 days before the expiration of the present subscription.[citation needed] In that case, the subscriber may contest the charges with the credit card issuer, but this recourse is likely to fail if in fact the subscriber had authorised such a "continuous payment authority".
Some antivirus programmes are actually spyware masquerading as antivirus software. It is best to double-check that the antivirus software which is being downloaded is actually a real antivirus program.
Some commercial antivirus software programs contain adware. For example, the home/small business version of CA Anti-Virus 2008 displays an advert for CA products whenever the desktop is unlocked after a period of inactivity.
Antivirus, mobile devices and innovative solutions
It would be no surprise when viruses that plague the desktop and laptop world quickly migrate to mobile devices. More and more vendors in this space are offering solutions to combat secure mobile handsets with antivirus solutions. Mobile devices present significant challenges for antivirus software, such as:
Processor constraints
Memory constraints
Definitions and new signature updates to these mobile handsets
SIM, flash based and USB based antivirus products
Mobile handsets are now offered with a variety of interfaces and data connection capabilities. Consumers should carefully evaluate security products before deploying on small form factor devices.
Solutions that are hardware-based, perhaps USB devices or SIM-based antivirus solutions, might work better in meeting the needs of mobile handset consumers. Technical evaluation and review on how deploying an antivirus solution on cellular mobile handsets should be considered as scanning process might impact other legitimate applications on the handheld.
SIM-based solutions with antivirus integrated on the small memory footprint might provide a basic solution to combat malware/viruses in protecting PIM and mobile user data. USB and Flash memory-based solutions give the user an advantage to swap and use these products with a range of hardware devices.
History
There are competing claims for the innovator of the first antivirus product. Perhaps the first publicly known neutralization of a wild PC virus was performed by European Bernt Fix (also Bernd) in early 1987. Fix neutralized an infection of the Vienna virus. First edition of Polish antivirus software mks_vir started in 1987. Program was only available in Polish language version. Autumn 1988 also saw antivirus software Dr. Solomon's Anti-Virus Toolkit released by Briton Alan Solomon. By December 1990 the market had matured to the point of nineteen separate antivirus products being on sale including Norton AntiVirus and ViruScan from McAfee.
Peter Tippett made a number of contributions to the budding field of virus detection.[citation needed] He was an emergency room doctor who also ran a computer software company. He had read an article about the Lehigh virus and questioned whether they would have similar characteristics to biological viruses that attack organisms. From an epidemiological viewpoint, he was able to determine how these viruses were affecting systems within the computer (the boot-sector was affected by the Brain virus, the .com files were affected by the Lehigh virus, and both .com and .exe files were affected by the Jerusalem virus). Tippett’s company Certus International Corp. then began to create anti-virus software programs. The company was sold in 1992 to Symantec Corp, and Tippett went to work for them, incorporating the software he had developed into Symantec’s product, Norton AntiVirus.[citation needed]
A very uncommon use of the term "antivirus" is to apply it to benign viruses that spread and combated malicious viruses. This was common on the Amiga computer platform.[citation needed]
Antivirus" redirects here. For antiviral medication, see antiviral drug.
Antivirus software consists of computer programs that attempt to identify, thwart and eliminate computer viruses and other malicious software (malware).
Antivirus software typically uses two different techniques to accomplish this:
Examining (scanning) files to look for known viruses matching definitions in a virus dictionary
Identifying suspicious behavior from any computer program which might indicate infection. Such analysis may include data captures, port monitoring and other methods.
Approaches
Dictionary
In the virus dictionary approach, when the antivirus software looks at a file, it refers to a dictionary of known viruses that the authors of the antivirus software have identified. If a piece of code in the file matches any virus identified in the dictionary, then the antivirus software can take one of the following actions:
attempt to repair the file by removing the virus itself from the file
quarantine the file (such that the file remains inaccessible to other programs and its virus can no longer spread)
delete the infected file
To achieve consistent success in the medium and long term, the virus dictionary approach requires periodic (generally online) downloads of updated virus dictionary entries. As civically minded and technically inclined users identify new viruses "in the wild", they can send their infected files to the authors of antivirus software, who then include information about the new viruses in their dictionaries.
Dictionary-based antivirus software typically examines files when the computer's operating system creates, opens, closes or e-mails them. In this way it can detect a known virus immediately upon receipt. Note too that a System Administrator can typically schedule the antivirus software to examine (scan) all files on the computer's hard disk on a regular basis.
Although the dictionary approach can effectively contain virus outbreaks in the right circumstances, virus authors have tried to stay a step ahead of such software by writing "oligomorphic", "polymorphic" and more recently "metamorphic" viruses, which encrypt parts of themselves or otherwise modify themselves as a method of disguise, so as to not match the virus's signature in the dictionary.
Suspicious behavior
The suspicious behavior approach, by contrast, doesn't attempt to identify known viruses, but instead monitors the behavior of all programs. If one program tries to write data to an executable program, for example, the antivirus software can flag this suspicious behavior, alert a user and ask what to do.
Unlike the dictionary approach, the suspicious behavior approach therefore provides protection against brand-new viruses that do not yet exist in any virus dictionaries. However, it can also sound a large number of false positives, and users probably become desensitized to all the warnings. If the user clicks "Accept" on every such warning, then the antivirus software obviously gives no benefit to that user. This problem has worsened since 1997[citation needed], since many more nonmalicious program designs came to modify other .exe files without regard to this false positive issue. Thus, most modern antivirus software uses this technique less and less.
Other approaches
Some antivirus software use other types of heuristic analysis. For example, it could try to emulate the beginning of the code of each new executable that the system invokes before transferring control to that executable. If the program seems to use self-modifying code or otherwise appears as a virus (if it immediately tries to find other executables, for example), one could assume that a virus has infected the executable. However, this method could result in a lot of false positives.
Yet another detection method involves using a sandbox. A sandbox emulates the operating system and runs the executable in this simulation. After the program has terminated, software analyzes the sandbox for any changes which might indicate a virus. Because of performance issues, this type of detection normally only takes place during on-demand scans. Also this method may fail as viruses can be nondeterministic and result in different actions or no actions at all done when run - so it will be impossible to detect it from one run.
Some virus scanners can also warn a user if a file is likely to contain a virus based on the file type.
An emerging technique to deal with malware in general is whitelisting. Rather than looking for only known bad software, this technique prevents execution of all computer code except that which has been previously identified as trustworthy by the system administrator. By following this default deny approach, the limitations inherent in keeping virus signatures up to date are avoided. Additionally, computer applications that are unwanted by the system administrator are prevented from executing since they are not on the whitelist. Since modern enterprise organizations have large quantities of trusted applications, the limitations of adopting this technique rest with the system administrators' ability to properly inventory and maintain the whitelist of trusted applications. As such, viable implementations of this technique include tools for automating the inventory and whitelist maintenance processes.
Issues of concern
The ongoing writing and spreading of viruses and of panic about them gives the vendors of commercial antivirus software a financial interest in the ongoing existence of viruses. Some theorize that antivirus companies have financial ties to virus writers, to generate their own market, though there is no evidence for this.
Some antivirus software can considerably reduce performance. Users may disable the antivirus protection to overcome the performance loss, thus increasing the risk of infection. For maximum protection the antivirus software needs to be enabled all the time — often at the cost of slower performance (see also software bloat).
It is important to note that one should not have more than one antivirus software installed on a single computer at any given time. This can seriously cripple the computer and cause further damage.
It is sometimes necessary to temporarily disable virus protection when installing major updates such as Windows Service Packs or updating graphics card drivers.[citation needed] Having antivirus protection running at the same time as installing a major update may prevent the update installing properly or at all.
When purchasing antivirus software, the agreement may include a clause that your subscription will be automatically renewed, and your credit card automatically billed at the renewal time without your approval. For example, McAfee requires one to unsubscribe at least 60 days before the expiration of the present subscription.[citation needed] In that case, the subscriber may contest the charges with the credit card issuer, but this recourse is likely to fail if in fact the subscriber had authorised such a "continuous payment authority".
Some antivirus programmes are actually spyware masquerading as antivirus software. It is best to double-check that the antivirus software which is being downloaded is actually a real antivirus program.
Some commercial antivirus software programs contain adware. For example, the home/small business version of CA Anti-Virus 2008 displays an advert for CA products whenever the desktop is unlocked after a period of inactivity.
Antivirus, mobile devices and innovative solutions
It would be no surprise when viruses that plague the desktop and laptop world quickly migrate to mobile devices. More and more vendors in this space are offering solutions to combat secure mobile handsets with antivirus solutions. Mobile devices present significant challenges for antivirus software, such as:
Processor constraints
Memory constraints
Definitions and new signature updates to these mobile handsets
SIM, flash based and USB based antivirus products
Mobile handsets are now offered with a variety of interfaces and data connection capabilities. Consumers should carefully evaluate security products before deploying on small form factor devices.
Solutions that are hardware-based, perhaps USB devices or SIM-based antivirus solutions, might work better in meeting the needs of mobile handset consumers. Technical evaluation and review on how deploying an antivirus solution on cellular mobile handsets should be considered as scanning process might impact other legitimate applications on the handheld.
SIM-based solutions with antivirus integrated on the small memory footprint might provide a basic solution to combat malware/viruses in protecting PIM and mobile user data. USB and Flash memory-based solutions give the user an advantage to swap and use these products with a range of hardware devices.
History
There are competing claims for the innovator of the first antivirus product. Perhaps the first publicly known neutralization of a wild PC virus was performed by European Bernt Fix (also Bernd) in early 1987. Fix neutralized an infection of the Vienna virus. First edition of Polish antivirus software mks_vir started in 1987. Program was only available in Polish language version. Autumn 1988 also saw antivirus software Dr. Solomon's Anti-Virus Toolkit released by Briton Alan Solomon. By December 1990 the market had matured to the point of nineteen separate antivirus products being on sale including Norton AntiVirus and ViruScan from McAfee.
Peter Tippett made a number of contributions to the budding field of virus detection.[citation needed] He was an emergency room doctor who also ran a computer software company. He had read an article about the Lehigh virus and questioned whether they would have similar characteristics to biological viruses that attack organisms. From an epidemiological viewpoint, he was able to determine how these viruses were affecting systems within the computer (the boot-sector was affected by the Brain virus, the .com files were affected by the Lehigh virus, and both .com and .exe files were affected by the Jerusalem virus). Tippett’s company Certus International Corp. then began to create anti-virus software programs. The company was sold in 1992 to Symantec Corp, and Tippett went to work for them, incorporating the software he had developed into Symantec’s product, Norton AntiVirus.[citation needed]
A very uncommon use of the term "antivirus" is to apply it to benign viruses that spread and combated malicious viruses. This was common on the Amiga computer platform.[citation needed]
Wednesday, October 3, 2007
Kaspersky Anti-Virus 7.0.0.120
Kaspersky Lab represents a new generation platform for creating applications specifically designated for complex protection of personal computers and workstations.Main Advantages:* Combined antivirus technologies. Kaspersky Anti-Virus 6.0 relies upon integrated methods to scan for viruses: the reactive method (using signature databases) and proactive protection (behavior blocker and heuristic analysis).* Optimized for use on laptops. Users of laptops benefit from an economy mode that conserves battery energy, while users of WiFi (wireless)Internet services can automatically update antivirus databases. The program has been optimized for use on laptops based on Intel Centrino mobile technology, and for use on computers with Intel processors that support Hyper-Threading technology.* Simplicity and convenience. Kaspersky Anti-Virus 6.0 is installed and set up in a matter of minutes, while the context-sensitive help function helps users quickly understand the finer points of the program’s capabilities. Moreover, the program regularly notifies users of its current protection status and gives recommendations for dealing with virus epidemics and potential threats.
NOD32 Antivirus Software
Keep your important information safe & stay productive with peace of mind. NOD32 offers fast, comprehensive protection against a wide range of malware threats – without the burden of a bloated internet security suite. So easy to use: simply set it up and forget it .Comprehensive ProtectionRunning separate applications for viruses, hackers, adware, and spyware can slow your PC, be difficult to manage, and provide questionable protection. Beware of large, bloated internet security suites that consume hundreds of megabytes on your PC. These typically exist because vendors have acquired products and 'bundled' them together. In contrast, ESET NOD32 was designed from the core as a single, highly-optimized engine that works as a unified Anti-Threat system to protect against a broad spectrum of malware. Viruses, worms, spyware, and other malicious attacks, which are constantly evolving. ESET NOD32 utilizes patent-pending ThreatSense® Technology to detect tomorrow's threats in real-time, by analyzing code execution for malicious intent - keeping you ahead of the malware-writers.Minimal Performance ImpactNOD32 conserves resources in memory and on disk, leaving more for your critical applications. The installer is just 11 MB and the application consumes an average 23 MB in memory (this fluctuates with changes to the detection technology). ThreatSense updates, which include heuristics logic and signatures, are usually between 20 kB and 50 kB. Switch to NOD32 and be more productive.Fastest ScanningGreat protection doesn't have to slow down your computer. Written largely in assembly language, NOD32 continually wins awards for the fastest performance of any antivirus application, on average 3 to 34 times faster than the competition (source: Virus Bulletin). Switch to NOD32 and upgrade your computer's performance.Easy to ManageProgram and database updates are automatically performed behind the scenes. If you're an individual or home office user you can just 'install it and forget it.' Businesses and organizations with large distributed networks can use the powerful Remote Administrator to centrally deploy, install, monitor and manage thousands of NOD32 workstations and servers. Get the best protection with the smallest footprint and fastest performance. NOD32 offers multiple layers of protection for your organization, at the desktop, file server and mail gateway. Find out which solution is best for you.Proactive Real-Time DetectionThe best security is proactive. Malware protection must be real-time at the point of impact. Every minute one waits for a virus signature update creates a window of vulnerability that could have devastating consequences. ESET NOD32's ThreatSense® Technology closes the window of vulnerability left open by other reactive , signature-based responses.
AVG Antivirus Professional 7.5
VG is the well-known antivirus protection tool. AVG is available free of charge to home users for the life of the product. Rapid virus database updates are available for the lifetime of the product, thereby providing the high level of detection capability that millions of users around the world trust to protect their computers. AVG Free is easy to use and will not slow your system down (low system resource requirements). Highlights include automatic update functionality, the AVG Resident Shield, which provides real-time protection as files are opened and programs are run, free Virus Database Updates for the lifetime of the product, and AVG Virus Vault for safe handling of infected files.Highlights include:- Automatic update functionality- The AVG Resident Shield, which provides real-time protection as files are opened and programs are run- The AVG E-mail Scanner, which protects your e-mail- The AVG On-Demand Scanner, which allows the user to perform scheduled and manual tests- The AVG heueristic analysing monitor- Free Virus Database Updates for the lifetime of the product- AVG Virus Vault for safe handling of infected files- Great customer satisfaction!
Avast Professional Edition 4.7.1001
From ALWIL Software a.s.:Avast! 4 Professional Edition is a complete ICSA certified antivirus software for corporate and advanced home use. Avast Professional Edition includes an on demand scanner with two user interfaces, a skinnable simple interface: just select what you want to scan and in which way and press the play button, an enhanced user interface: Outlook like UI allows users to set any feature of Avast, prepare and run tasks, store and check task results, on access scanner: special providers to protect: most available e-mail clients, instant messaging: ICQ or Miranda, network traffic: lightweight firewall, P2P protection for Kazaa, BitTorrent, Web shield: all HTTP traffic, script blocker. Avast Professional Edition is available in 31 languages. Small, true incremental, updates are downloaded and installed automatically.
Version 4.7.1001 is fully compatible with Outlook 2007, it contains new unpackers and is available in 3 new languages.
Norton AntiVirus 2007
Norton AntiVirus 2007 blocks viruses and spyware with advanced protection. It helps protect your entire computer by stopping viruses, spyware, and other security risks. Norton AntiVirus works in the background so you can surf the Internet, read the news, play games, and download software or music without disruption. It also scans and cleans all email and instant messaging (IM) attachments, preventing you from receiving viruses, or spreading them to others. With set-it and forget-it functionality, Norton AntiVirus checks for updates continuously and automatically blocks new and emerging threats from getting on your system. In addition to protection updates, Norton AntiVirus provides new product features as available throughout your service subscription
TRADE SECRET PROTECTION
Trade secret protection is an important means of protecting computer software. Coupled with copyright protection, this is often the most effective way to protect computer software. Computer programs are copyrightable works under U.S. copyright law. The Copyright Office now regularly issues registrations for computer programs. Both source code and object code can be registered although a "rule of doubt" registration will be issued for object code.
If the source code contains trade secret information, the Copyright Office protects this trade secret information by utilizing special deposit requirements.
If the source code contains trade secret information, the Copyright Office protects this trade secret information by utilizing special deposit requirements.
Whenever possible, computer software should be protected under trade secrets law. If software is sold or licensed to another party, contracts should be used which require the receiving party to maintain the "trade secret" status of the software and not to disclose or use the software except in accordance with the express terms of the license or contract.
Do not sell the source code. At all times, access to the source code should be strictly limited to others on a "need-to-know" basis with an obligation of confidentiality.
COPYRIGHT PROTECTION
Only a single registration is necessary to cover both the computer program and the accompanying visual displays and audio portions. A copyright notice should be used because it eliminates the "innocent infringer" defense. Typical locations for the copyright notice are (1) the software itself so it shows up when the source code is printed, (2) on user display screens, (3) on the software storage medium (i.e., the floppy disk), (4) on the computer user manual and (5) on all printed output formats.
"Shrink wrap" licenses remain popular to characterize the transfer of possession of computer software as a "license" rather than a "sale." This provides advantages to the copyright owner and requires the purchaser to maintain the trade secret status of the software by prohibiting decompilation of the software.
Lawsuits for copyright infringement of computer software have been a quagmire. The reason for this relates to the type of protection afforded by copyright law. Copyright law only protects the "originality of expression" not "the underlying idea" or "function." Therefore, by definition, copyright protection alone is often inadequate to protect the commercial value of computer software.
Nevertheless, reverse engineering activities involving existing software should be carefully coordinated with intellectual property counsel. "Clean Room" methods have been developed to protect against copyright infringement actions involving decompilations of existing computer software.
PATENT PROTECTION
In Diamond v. Diehr, 450 U.S. 175 (1981), the United States Supreme Court opened the door to patent protection for computer software by holding that a process for curing synthetic rubber using a mathematical formula in a programmed digital computer was proper subject matter for a patent.
Patentability issues relating to computer software is a complex subject. Generally, software patent applications should be limited to inventions of significant commercial value. If the commercial life of the software is only a few years, patent protection may not make much sense because it will take at least two or three years for the software patent to issue. Further, the issuance of a patent will destroy the trade secret status of the software. Once a patent issues, the patented features of the invention will be in the public domain.
However, under certain circumstances, software patents are clearly the best way to protect computer software. For example, in 1994, Stac Electronics won a $120 million verdict when a jury found that Microsoft Corporation had infringed Stac's data compression software patents in the sale of 28 million copies of the MS-DOS Version 6.0 disc operating software. Subsequently, Microsoft agreed to pay $43 million and to buy $40 million in Stac stock to settle the dispute.
Patentability issues relating to computer software is a complex subject. Generally, software patent applications should be limited to inventions of significant commercial value. If the commercial life of the software is only a few years, patent protection may not make much sense because it will take at least two or three years for the software patent to issue. Further, the issuance of a patent will destroy the trade secret status of the software. Once a patent issues, the patented features of the invention will be in the public domain.
However, under certain circumstances, software patents are clearly the best way to protect computer software. For example, in 1994, Stac Electronics won a $120 million verdict when a jury found that Microsoft Corporation had infringed Stac's data compression software patents in the sale of 28 million copies of the MS-DOS Version 6.0 disc operating software. Subsequently, Microsoft agreed to pay $43 million and to buy $40 million in Stac stock to settle the dispute.
TRADEMARK PROTECTION
The Patent and Trademark Office has issued a special rule which permits filing a photograph of a computer screen as evidence of trademark use. U.S. Patent & Trademark Office, Trademark Manual of Examining Procedure § 905.04(d) (2d ed. 1993). This rule is necessary because purchasers of computer programs often do not see the computer trademarks until the "trademark" comes up "on the screen" after installation of the computer software.
If the software is being advertised as "compatible with" other trademarked hardware or software, the software must in fact be truly "compatible." Otherwise, problems may arise under Section 43(a) of the Lanham Act, 15 U.S.C. Section 1125(a), or state and common law unfair competition laws.
If the software is being advertised as "compatible with" other trademarked hardware or software, the software must in fact be truly "compatible." Otherwise, problems may arise under Section 43(a) of the Lanham Act, 15 U.S.C. Section 1125(a), or state and common law unfair competition laws.
SOFTWARE PUBLISHERS ASSOCIATION
Software companies should belong to the Software Publishers Association (SPA), 1730 M Street, NW, Suite 700, Washington, D.C. 20036, (202) 452-1600. More than 1,100 companies belong to the SPA. The SPA enforces copyrights against the unauthorized copying of software and the proceeds from each lawsuit are used to fund future litigation. The SPA "antipiracy" hotline is 1-800-388-7478.
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