I'd have to agree with the sentiment about running Linux... No viruses there.
I just got a new system and it will be on Linux shortly. Right now it's a Windows 7 setup with McAfee. I don't think much of McAfee anymore. Even less of Norton. The load they place on the system IS a virus.
Back in the day... when McAfee 2.5.1 was a modern engine... there was nothing that could come close to comparing to it. Sadly those days are gone.