When I start this XP Media Center PC I get the BSOD with UNMOUBTABLE_BOOT_VOLUME message. Then at the bottom is STOP: 0x000000ED
(0x82D9F7C8), (0x0000006),(0x0000000) (0x0000000). I can't boot in safe mood or any of the choices to boot. Is there a quick fix? I have the OS cd.