I have the Zone Alarm Internet Security Suite. It has everything. I also run Windows Defender, Windows Firewall and NVidea Firewall.
Guess what? I still got hit with a trojan about two weeks ago. Damn thing trashed my Windows System 32 files. Only when using the byte level scan from Zone Alarm Anti-virus did I find the problem. I still had to reload Windows and start from scratch. (I'd bet I got the trojan from a movie DVD)
I've used AVG in the past. Never really liked it. Now days I just look at anything on a computer as disposable. I back up EVERYTHING.
Fecal Matter Happens