Well it's happened again. The computer froze and when I rebooted it got in to the same ole reboot loop. I shut it down for about 20 minutes and was able to get back to windows when I started it up.
Ok the most serious cause is overheating. If you overheat you can cause permanent damage. Download and install this. Let me know how hot it gets, especially if it has the problem, again.
Since the problem occurs after contiuous use, overheating is a prime suspect.
According to the person that put the computer together thats the north bridge and that temp is normal with the motherboard I have.
Not to mention I was having this problem with the Asus motherboard I had in it and since then have changed to a Evga 750i and am still having the reboot problem.