I have Windows XP Home Edition SP2 installed on my new box. I just build this PC and have a GeForce 6600 on an ASUS K8N board. Using an AMD Athlon XP 3600+, and every time I try to open a .wma file, .avi file, or any media file, the computer lags up. I open the taskmanager and see that the media program is using up 99% of cpu usage. What could be the cause of this? I can play games like Battlefield 2 and Counter-Strike:Source just fine on the PC, but when I attempt to watch a trailer either streaming it or downloading and trying to open, the file is never opened.