That might do it. Make sure EVERYTHING it tightened. Also ur HD/MEMORY can cause ur pc to reboot too. Infact take a close look at your ram/memory module and make sure it is tight. I recall my first box doing just what ur box is doing. Turned out it was the damn PCChip MB i had the memory socket was loose. So i used a cable to type the memory. Never had any problems from that point on.