My computer has gone schizo on me and now I'm looking for ideas/opinions... The Problem: several days back, on startup the computer got as far as the Windows logo screen then suddenly restarted. On the second start attempt, I got an "overclocking failed" message with the option to go into the BIOS to change settings to default. My computer is not overclocked. All BIOS settings appeared normal. After exiting the BIOS without making changes, it again got as far as the Windows logo screen before restarting. THIS time, it went to the screen telling me that the last Windows startup had a problem and gave me the option to go to Safe Mode, use the last known good config, or start windows normally. I could get into Safe Mode ok, but didn't have time to troubleshoot, so I shut the computer down normally. A few days later, I tried to start the computer again thinking I could go back to Safe Mode and troubleshoot, run a virus scan, etc. This time,though, the computer began restarting continuously after it's initial power-on checks (where it shows the processor, RAM, etc. before it starts loading Windows). So, the Safe Mode option seems to be out for me now... The System: Built in 2004, Pentium 4 3.20 GHz, 3198 clock speed, 1 Gig RAM (2 512MB DIMMs), Windows XP Pro, ASUS P4C800-E motherboard, Radeon 9800XT video card, 420W power supply, Soundblaster Audigy 2 ZS, 160 Gig Seagate hard drive. Prior to this problem, the anti-virus was up to date (full system scans run monthly / mini-scans run daily). Personally, I suspect the power supply or some other hardware failure, but thought I'd throw this one out there and see what other folks thought as I haven't yet had time to go any further with this. Thanks for any info/suggestions you might provide!