Possible DirectX problem, also a shutdown issue

Hello everyone.

I have for a while ago submitted a thread here (Bsod problem), Well a few hours ago the replacement GFX arrived, however I cannot play any game (except minecraft). I can't play Assassins Creed 3 or BF3. When I open up AC3 it opens and just when I have selected game and stuff, it just freezes. Well when I'm playing BF3, I am able to join the server, then just spawn and then the game freezes and throw an error message at my face:

(Exactly as I wrote it, even caps)

DirectX function "GetDeviceRemovedReason" failed with DXGI_ERROR_DEVICE_HUNG: Device hung due to badly formed commands.. GPU: "NVIDIA GeForce GTX 570 ", Driver: 31407

Well I thought it might was an issue from the repair suggestions from my previous GFX. So I tried to update and upgrade drivers, spend a lot of time to try to reinstall DirectX (without success, I download the web installer but it says that I already have a equal or newer version installed).

After my driver updates it gives me the same message except the driver number is changed to 31422.

So after I've spent 4 hours, I come back on my knees and asking for help.

So anyone out here who might be able to help me?

Regards
Søren