"No ATI graphics driver is installed", please help

[vj8usa]

I've been trying to install the 10.1 Hotfix drivers on my system, and I get this error message every time:
"No ATI Graphics driver is installed, or the ATI driver is not functioning properly. Please install the ATI driver appropriate for your ATI hardware."

During the driver install, the screen goes to a low, 4:3 resolution, but doesn't go back to full res after a few seconds like it normally does during a driver upgrade. It also asks for a reboot after the installation, which isn't normal. After the reboot, the screen stays at the low resolution, and the error comes up. I've tried uninstalling the drivers before installing the hotfix, and that doesn't help either. Any ideas?

 

[happy medium]

Mabe you have a corrupt driver? . re download?

 

[vj8usa]

The file's fine. At any rate, I just went back to 9.12. I think the hotfix was only intended for crossfire configurations anyways; I had downloaded it to use AA in ME2 but you can just rename the exe to UT3 and that's been working well for me thus far.