I just put this new machine together with a P4P800, 3Ghz P4. I installed Windows XP Pro along with all the drivers for the motherboard. Everything was fine until the past few days when it randomly started rebooting itself. The last few days it has been only a few times a night, but today it is rebooting every few minutes...sometimes even before it comes up completely to the desktop. Might it be over-heating? Is there any way to check? It is not overclocked. Any ideas?