I noticed in your forum as well as VIAArena.com and AMD.com and a bunch more, people are having CPU usage problems after installing XP SP1. I had the same problem, my usage was about 56% at idle. I found a thread in a forum, tried it and it worked for me. If you wanna let people know im sure they'd really appreciate it. This is the website with the fix: Hardcoreware.net forum - WinXP + SP1 = 56% CPU Usage @ Idle? Thanks a lot, My name is Justin Roach :)