Well, I have been using AVG 8 for quite some time now without problems on our 5 household computers. I think it was version 8 which incorporated the antispyware previously provided by a separate program, which AVG acquired a couple of years ago and it may be this which causes problems for some. I always use Superantispyware and the other software mentioned here for my spyware/adware defense which AVG 8 in my case accepts without problem.
P.P.