Question

How does signature based antivirus software work on a computer?

Answer 1

Heuristic-based detection - This type of detection is most commonly used in combination with signature-based detection. Heuristic technology is deployed in most of the antivirus programs. ... Verifying the actions of the program that are logged in, the antivirus software can identify if the program is malicious or not.

Antivirus software scans the file comparing specific bits of code against information in its database and if it finds a pattern duplicating one in the database, it is considered a virus, and it will quarantine or delete that particular file.