My pc keep shutting down and sometimes restarting I am using win xp causr I don't have 7 dvd. I reformatted few times but problem won't go away I also unchecked Automatic restart but It did not showed me any Bsod when restarting. I have checked the event viewer for any unusual activity but came out ok. Then i checked for any loose connection but did not found any. As a last resort I reformatted my pc with ubuntu but problem presists. My specs i3, 2GB ddr3 dual channel , Asus mobo, 1TB sata hdd, Dvd ram, onboard vga and korean made 650W psu. Pc is newly assembled one and worked very well for 2 months. I personelly suspect psu. Do you guys have any clue what's wrong with my pc? weird thing about this is that when pc shutdown without cause it will automatically turn on after like 2 minutes. Sometimes it does not shutdown but resets.