I was using AVG and ZoneAlarm. ZA went buggy, so I installed Comodo, which I think has too much to configure. Anyway, turns out that AVG only finds mid-level to minor threats, but lets the really bad stuff stay in your computer. My AVG updated every day, and scanned every week, yet somehow missed the Sasser Worm that had installed itself into my Windows XP OS. Automatic updates would neither download nor install, and the internet connection was really wonky. At first I thought it was a firewall problem. An IT friend found the problem, fixed it, and told me that you really get what you pay for with all the free anti-virus and firewall programs out there. He said that most of the infected computers he worked on had AVG running on them, and that people who use the free stuff have a false sense of security.
So what would you recommend?
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