Can someone help me? My system keeps freezing on me for no reason

[Legolas8181]

It will keep freezing over just a few hours apart from each freeze and I really don't understand why it's happening. I don't have any viruses or anything like that cus AVG is running in the background picking anything up and I have nightly scheduled scans, I keep my drivers up to date and all that. Anything else? My specs are in my signature

 

[scout_03]

use this on sensor page and check temp http://www.hwinfo.com/download.php and this other for any bsod files http://www.resplendence.com/whocrashed