I've built a new rig under a month ago and it has just restarted during WoW as if someone just pressed 'restart'. Can someone please help me with this? it has happened twice now. Specs are Intel I5 Quad 3.4ghz, Gigabyte 750GTX graphics, 500W PCU, asus motherboard, Corsair tower and a 1tb HDD. Thank you. also windows is Windows 7 and is on my HDD