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Questions tagged [av-definitions]

Antivirus definitions are databases of signatures and other information that provide anti-virus (and other security software) with the necessary data they need to detect malware.

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Windows Defender definitions are outdated [duplicate]

Yesterday I have downloaded and run a program, which, I guess, have turned out to be a virus. There showed up a notification, that Windows Defender is turned off and I should turn if on. When I have ...
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Prevent Security Essentials from creating a system restore point before definition update?

It is really annoying (and baffling) that Security Essentials always creates a system restore point before updating its definitions. There is no good reason to do this and creating a 2GB restore point ...