said by B
:AVG Free's still good, although not as efficient as it once was. The big problem (for some people) is failed updates. You can hack around the problem or go to one of the others such as Avast.
ZoneAlarm is still fine, although some people are having trouble with the later versions. I like ancient versions personally (ZAF 2.6.362, XP SP2 compatible), some people prefer 4.x, and some people prefer 5.x. Not a lot of 6.x fans yet from what I see.
-- B
In my case, I have never had an update problem with the latest version of AVG free, running on XP Home.