Security fundamentally requires trust. You can't function without trusting some other users and some programs. On the other hand, you can't completely trust everything, and that includes normally trustworthy software, such as Symantec's Norton AntiVirus.

A couple of months ago I began receiving virus notifications about a file that had been on my hard disk for a while. At that time, I was testing spyware removal tools for PC Magazine and this was the install file for one of the products. NAV reported that it found Backdoor.IRC.dr in the file. The suspicion about this infection was either inaccurate or newsworthy.

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