I brought a second hand Dell Dimension 3000 for my parents to use just for email. Anyway we did a complete fresh install of Windows XP SP3. Problem we have now is that when we go to Start > Shutdown. The computer does its shutdown process and everything turns off. Then 5 seconds it powers up again by itself. Not sure what the problem is. Have tried numerous google searches and fixes but no luck. The only thing that has worked is holding the power button in on the front of the tower for a few seconds and it now stays turned off.