have a Compaq 6016us running windows XP home. I recently did a system restore from the recovery disks. Now the machine, when I shut it down using start, then click the "turn off" icon, will shut down normally. Then, after about 2-3 minutes, powers on by itself, and reboots back into windows. There are no error messages. I downloaded and installed any available bios updates from Compaq. Oddly, if I unplug the machine while it is powered off, and then plug it back in, it does not power back up on its own. Any ideas?