I've just built a computer and installed Windows XP. Now for some reason, whenever I try to move a window, its not a smooth motion, but it stutters there and CPU usage for explorer.exe jumps to 99%!
I agree with pail_white_kid_rapper. I use ATI RAEDON 9550, and when using it on seperate partion, or on VM Ware my windows were jumpy until I downloaded and installed the drivers for it.