How old is your computer? It could be overheating. It could be a failing hard drive. It could be a virus or other malware. It could be failing capacitors on the motherboard. You can check the temps by downloading SpeedFan. Temps under 50 degrees C are good, over 65 a problem, in between bears watching. To check your hard drive, run chkdsk and let it check for bad sectors. To check for malware, boot to Safe Mode and do a full system scan. To check capacitors, remove the cover and look for swollen and/or leaky ones. To check for corrupt system files, go to the command prompt and issue the command: sfc /scannow .
Ok so my computers been acting up and completely freezing a lot and then when i restart it sometimes it won't even boot up and it will just stay a blank screen with a white courser blinking in the corner. And sometimes it'll make it to the gateway logo then freeze ..if im lucky it will actually start up and ill have a working computer for a couple hours (till it freezes again)