How does anti-virus software work to detect viruses and quarantine those or remove those from the full system

Question

How does anti-virus software work to detect viruses and quarantine those or remove those from the full system

Answer 1

Anti-virus software employs either heuristic or signature-based detection.

For heuristic detection, try reading:

http://wiki.answers.com/Q/What_is_heuris...

For signature-based detection, try:

http://searchsecurity.techtarget.com/new...

For general malware intrusion detection:

http://www.google.com/search?q=intrusion...

http://www.sans.org/info/27944