I know what your thinking turn off the automatic restarts. Well it is off. I had XP since the day it was release without problems then I upgraded my motherboard and processor to a p4 1.8. I turned off automatic restarts and yet it still restarts anywhere from 5 minutes to hours after I boot. other than the mother board and processor all the hardware and the software is the same. I checked the Event Viewer and no events are written. I went through the registry to see if the automatic reboots were really off and they were. This is my forth format and re-install in three days and looks like I am gonna have to settle with Windows 2000 Professional if I can't find out what is causing this soon! If you have any comments or suggestions or have the same problem let me know.