Alright so the issue seems to be getting worse, sometimes it works sometimes it doesnt. Usually i have to end up keep restarting the computer over and over after each lock-up until i finally get lucky and it doenst lock up. Sometimes it bluescreens me and sometimes it restarts the PC also. Rarely it will do it when not playing games. I've tryed about everything i can think of doing that you would normally do when these problems first occur I've cleaned out the PC, took vid card out then put back in, tryed new monitor, used advanced system care to clean my PC and registry up etc, nothing has helped so far. Im starting to think something is wrong with the video card, altho my BIOS needs a update but i dont know if that has anything to do with this, and i really dont know how to update BIOS anyways. Could also be the power supply altho its 650 watts so idk, its not realy old neither only around a year or so Im using Windows XP professinoal 32 BIT SP2 Video card is Nvidia Geforce 8600 GT if that is of any help By the way overheating is not an issue, ive checked temperatures on most things in PC, and PC chip si running around 27 celcius-30 celicius always. Any help is appreciated, thanks.