A few days ago while i was playing CSS, my computer screen freeze and i couldn't control it using my keyboard so the only option is to restart by pressing the button at base unit. I then try again to play the game but same problem exists. So i try other full screen games i have and the problem still exists. After all of that i scan my computer for virus/spyware but nothing found and i check the temperature but the temperature looks the same as before. I thought it was the new graphics driver i installed a few weeks ago so i uninstalled it and installed the old one i used before but it still freeze

I even disable my antivirus to see whether it use too much ram but computer still freeze. I also clean my registry+other crap using ccleaner but doesnt work.
Any help would be appreciated
