Installed Vista, Video card not working

Hi, I bought a Asus g73jh which comes stock with windows 7. I downgraded to vista. It installed all the drivers through update. I noticed graphics were not working right and I got a 1.0 in that area in the windows experience index.

The graphics card is ATI mobility radeon HD 5870. I downloaded the catalyst driver update for the card and installed/ran it, it didn't give me any problems, but didn't fix the problem.

I ran CPU-ID and under the graphics tab everything is blank.

In the device manager I have the following yellow exclamation points:
-Standard VGA Graphics Adapter
-Network Controller
-PCI Simple Communications Controller
-Unknown Device

Under display adapters there is only Standard VGA Graphics Adapter (and it has a yellow ! as mentioned).

I was thinking maybe I should have something about video controllers under Sound, video and game controllers in the device manager but there is only something about sound.

Please help.

BTW like I said the stock operating system is windows 7 therefore the only drivers I have on disc are for windows 7 and not vista.