My machine P3 866 Motherboard 815 .. is rebooting automatically at the initial screen after Power On Self Test (POST) screen when the screen shows "Starting Windows" and the Progress bar moves from left to right. The OS is Windows 2000 SP4. I cant figure out whether its problem with Windows or its a Hardware Problem. Or maybe a virus ? Ari __________ I have some Important data in the machine. So I dont think Formatting is a viable Option. In case this doesnt have a solution .. Would intalling Windows XP/Win 2000 help ? I think my files would be saved like this..