Ok so I'm running Vista Ultimate x86 and I recently had to switch from a nVidea to and ATI Radeon x800. I went and downloaded the most recent drivers and in the past few days my desktop randomly freezes or I get a bsod that does a mem dump. I've tried reinstalling vista and the drivers for the video card, but it still does it. Has anyone else had this problem? How in the world do I fix this.