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How does an Anti Virus Program recognize the Virus? What is...

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Question by Aryan
Submitted on 8/23/2003
Related FAQ: Computer Virus FAQ for New Users
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How does an Anti Virus Program recognize the Virus? What is Virus fingerprints?

Answer by PrashantK
Submitted on 9/12/2003
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A computer virus is simply a set of computer instructions or computer code that was written by some unscrupulous person. This code is attached to some part of the normal computer operating system or computer program. The instructions in this code tell the computer to perform some task. This task is often a destructive one, such as deleting important information or crashing the hard disk. However, there are other benign viruses that may only be a slight aggravation. Some viruses have been known to do nothing more than to put a large happy face on your computer screen.

Anti-virus software has the ability to detect viruses and other forms of malicious software by opening executable programs and documents and looking for specific command sequences used by known viruses. These command sequences are called "signatures". Additionally, the better anti-virus programs as a technique called "heuristics" which improve its ability to detect unknown viruses by looking for command sequences that may not match a specific signature, but are somewhat suspicious.
Anti Viruses use these kind of signatures or otherwise known as virus fingerprints to detect the viruses. Anti Viruses looks for these signatures (a set of command a virus program is using) to detect and find viruses on computers.


Answer by fizzymax
Submitted on 12/21/2003
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Most viruses especially the earliest ones were simply a repetitive code. That is a program that repeats itself without end.
Even now most viruses use some form of repetitive code to propagate themselves.
Anti-virus programs often look for these signs and mark programs that do this as a virus.


Answer by mits
Submitted on 2/20/2004
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virus stands for Vital Information Resource Under Seiged,while booting ur system for the
first time there is a program by name as the bootstrap that gets loaded into ur memory,serious virus programmers aim this act,but mainly virus programs are code that access the main storage elements and tries to mishandle data,and it cant be deleted as it copies from one location to another as they are T.S.R's terminate & stay resident prog.. they remain in the memory even after execution,a good anti virus first doesnt allow any malicious code in the memory while booting & also access to 2n dry devices are checked using certain hard ware.  


Answer by kazmania
Submitted on 4/24/2004
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how do you create an anti virus program?


Answer by azeta
Submitted on 11/17/2006
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i need infos about anti virus!!!


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