FYI I already tried uninstalling and reinstalling the drivers. But I'm not so computer adept that I know what to do from that point on. I would take advice from other threads but to be on the safe side I don't know if it works the same for everyone else.
My computer specs are here:
Asus Crosshair IV Extreme
AMD Phenom II X6 1100T
G.Skill Sniper 8GB 1600
Asus Radeon HD6950 2GB DU2
OCZ Agility 3 SATA III 60GB
HITACHI Deskstar 7K3000 (x2)
Corsair H50
Kingwin LZ-1000 PSU