Currently all 4 of my CPU cores are heating up without explanation and I don't know why. All of my fans are working perfectly fine yet even when all programs are closed, all cores run around 65% of their maximum load. This all started yesterday when I got a Nvidia opengl driver error code 7 while playing some games. I have also blown out the case with compressed air to clear out all of the dust yet it is still over heating. The only time it didn't overheat(ish) was when I did not go on it for about 6 hours and then turned it on ( this was after I cleaned the dust out) and it worked fine for about 2-3 hours. Any help?