So I've been trying to get my roommate's computer to operate properly. It had been rebooting periodically at odd intervals. Sometimes it was relatively stable. I downloaded/ran a virus checker which got rid of a few things. I also went to Windows Update, installed the latest service pack (for windows 2000) and got about halfway through the other installations when ... his computer rebooted. Argh! ... Now I can't even get into Windows. I myself don't run windows 2000 and as far as we can tell, my roommate doesn't have any kind of bootable disk for his computer at all. (argh!) I get one of two stop errors on startup: 0x0000001E (KMODE_EXCEPTION_NOT_HANDLED) or 0x000000A5 (bios not ACPI compliant). At this point I'm about to suggest he just get a new OS and reinstall everything, in the hopes that will actually work, or at least work long enough to correct any bios problem. I figured I'd at least poke around a bit online first to see if there were any other options. Any help would be greatly appreciated.