I'm using Windows Vista Ultimate edition (x86). I've been having this problem for as long as I've had Vista now and could never find any reliable information about it. I'd say once about every 10 times I start my computer, all of my startup programs will load fine, but the screen will just freeze for a half second every five seconds. When I say freeze, I mean that you can't see the mouse moving, or anything at all moving or updating (including Windows DreamScene). The entire screen just completely freezes. This creates an extremely annoying jerky type of computer environment. Every time this happens I am forced to restart my computer. This also has happened after I have been using my computer for a while (albeit much more rarely). While this might not seem like that big of a problem, it is quite annoying, and if anyone could help me out, that would be great. Thanks.