Detected a bug!!! May be. Some files belonging to my HP Games folder were detected as virus (susp). I think it's the heuristic or behavioral componant because by running a simple scan the files are sane. Uploading them to Jotti or VirusTotal gives me green checked results too. When I try to tell Avast in the scan results to "Ignore the file", well nothing happens!! To quarantine or repair them, I have to boot safe mode and then run Avast result scan screen. Since I had last year the same virus detection problems when using the Comodo 5 suite (which I removed for incompatibilities with some critical Windows Updates), I decided to remove the folder (since I don't use games...!).
Anyways, being the files "sane" I would have kept the folder if Avast would have given me this opportunity. When trying to send or email the file to Avast, I was stopped as a warning message was telling me it was a virus. I'm sure 99% it was FP, though!
N.B.:Of course, I had the option of keeping them in quarantine, but did not like it!