I'm stumped. I have an ATI Radeon HD 4350. Currently I am using the WDDM 1.1 drivers
that came with my Windows 7 Ultimate 64-bit install (store-bought). It's been working fine for normal use, but the drivers are 2 years out of date and no games want to work on my system.
I tried installing the Catalyst 11.11 driver
package, rebooted and... the result was that Windows suddenly treated my video card like it didn't have ANY drivers; it defaulted to the Standard VGA drivers and didn't even want to acknowledge that the proper drivers for my card existed on my computer. When I brought up Device Manager to manually install the new drivers, it listed the new drivers as ATI Radeon HD 4300/4500 along with the old ATI Radeon HD 4350 (Microsoft Corporation WDDM 1.1)- which I kinda/sorta get but don't really. What's the difference between the 4300/4500 and the 4350? Red herring; ignore that.
Anyway... I can revert back to the original 4350 drivers and the screen looks fine, but I'm not getting to use any of the games I've got installed now. I also noticed that, while looking through my System Information, the 4350 is causing some sort of hardware conflict with the PCI-to-PCI Bridge. Which completely drives me bonkers because it WORKS with the WDDM 1.1 drivers.
Anyone got any bright ideas? I'm all ears.