I've recently had a problem with my computer freezing up a lot. It seems to happen mostly when I'm playing video on the computer -- I can never play more than 5 minutes of video w/o my comp freezing up. I installed a fresh copy of WinXP and it still does the same thing. I've swapped out my RAM and flashed my BIOS and it still happens. Any more suggestions before I try the expensive route of a motherboard/CPU swap?