I have just built a computer. I took my hard drive, DVD-ROM and CD burner, floppy and put it on a new motherboard and case. The motherboard is a Soyo KT333 Dragon Ultra Platinum with an AMD Athlon XP 2000 and 1 stick of 512mb DDR Ram. The case holds 5 fans (not including cpu fan). I have been able to install everything and it works fine until I decide to reboot. Windows starts to load and then it all of a sudden reboots on its own. What could it be?