wddm 1.1 1.2 1.3 update issue

hi,

i installed the wddm driver update and after that have no more video input/output on/to my screen.

i tried uninstalling, but the problem remains. only system restore did the trick for me.

what can i do to successfully use wddm 1.1 1.2 1.3 drivers from microsoft?

im using a c2q q8400 on a asrock g31m-gs with 4gb ram and a gtx 560.

if i select my onboard gpu (and attach screen to right vga slot ... ) i still get no signal to the screen

i do hear windows starting up and shutting down (if i shut it down) with both cards, i just cant see anything