Definition: What is a virus signature?
What is a false negative?
A false positive occurs when a virus scanner erroneously detects a 'virus' in a non-infected file. False positives result when the signature used to detect a particular virus is not unique to the virus - i.e. the same signature appears in legitimate, non-infected software.
If your antivirus scanner says a file is infected that you believe is clean, here are six steps to determine if a virus alert is legitimate.
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