In general, it has a ''pattern'' or ''signature'' it looks for that's unique to the virus or whatever malware it's tracking. Sometime,s the pattern isn't unique enough, and you get a ''false positive''.
How does the antivirus software identifies the file as a virus?spyware remover
It has a database that it searches, usually you update this database regularly, or it might do it itself.
How does the antivirus software identifies the file as a virus?virus removal
virus definitions are stored in a database on your computer. most of the time, the antivirus will recognize the coding in the file as harmful or corrupted. It might also recognize the virus in a process that is running on the pc.
if it is a REALLY crummy AV, it will be by file name only.
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