panic - 2:45 am on Oct 8, 2004 (gmt 0)

In all my years, I've never seen anything this strange before.

This PC powers on just fine, and I did the initial Windows setup with no problems, but after the "Loading Windows 2000" screen, the computer restarts on its own.

I thought it might be a hard drive problem, so I tried another hard drive, and the same thing happened.

Just for good measure, I switched the RAM, and it's still restarting on its own.

Any ideas as to what it might be?