Hi, I wanted to reply to this. For several weeks Windows XP has been freezing whenever I tried to delete thumbnails (especially) or icons on the desktop. It completely freezes. The last few days have been even worse, where I can't even right-click to get a menu without it freezing. I've done CHKDSK, system cleanup, removed superfluous programs, defragged, and finally, went through each and every system service, turned off and on, and by process of elimination found that it is Avast 4.8 Home that is causing the problem. I suspect there is some problem with Avast thinking that even legit deletions are virus activity...something like that? Anyway, I think this needs addressing.