It all started last week with new version 7 free anti-virus. Totally buggy with major GUI updating issues, and even with clean installs of new version. Really intense in their forums with complaints. Feel kinda sorry for the moderators trying to deal with the volume. I chose Avast in 2011 because I like apps requiring fewer machine and Windows resources, especially type 023 NT running services. Tried most of the free anti-virus apps out there and landed on Panda, and now Avast 6. I guess no A/V product out there was, is, or will ever be flawless, even with a properly configured OS.