I had false posative problems with AVG and their forum was a bit snotty. I switched to Avast and when I had a problem I'd submit it and it would be cleared up ion a day or 2 in the updates. The problem AVG detected and froze on was SP2 for XP. I had it on the HD so I could slipstream XP. That and some of the other stuff for slipstreaming caused false positives
Joe