Catalyst 5.7 WMP Problem

Installed a new 9800 Pro last month and since then It's been nothing but problems. Games crashing mainly, but what really bugs is the cruddy video playback. All videos I play, mostly .wmvs, have hanging pixels ans some are even reduced to 3 colors!

I use Cat remover to get rid of the drivers and the problem goes away. After I reinstall the problem comes back. So I am trying to revert to the original drivers that cake on my Dell 4800 disk and I keep getting the "driver not found... try installing a standard vga driver... message.

Don't know how to do this on XP SP2, and after searching this sight it looks like no one else does either.

So basicaly it looks like I will live with this or reinstall windows. I was just wondering if anyone else has had there Media Player start acting strangely after installing these drivers?