TV Wonder 650 Combo PCIe Problems

[Unoriginal Name]

Lately I have been having problems with my 650 PCIe card. After updating the ATI Unified AVStream driver through Windows update neither Catalyst Media Center nor Vista Media Center worked. Incidentally I have Vista 64-bit. Anyway I uninstalled the card and reinstalled it and made sure this time that I didn't update the AVStream driver. VMC now works fine but when I go to use CMC it tells me there is no tuner card installed.

1) Why would the new driver render my card useless?

2) Why can I not use CMC anymore? This was the only way I could get QAM on my computer.

3) I was thinking about uninstalling both the tuner card and the graphics card which is a 2600XT and then re-install them. Is there an easy way to go through the registry and make sure there are no references to ATI anywhere in the registry?

I have a Asus P5K-E Wifi/AP mother board with a E6750 processor and 2GB RAM. Before installing the updated drivers both VMC and CMC worked and I was getting QAM through CMC. I have tried other PVR programs and I can't seem to get any of them to setup properly. I would be happy to switch from CMC if I could figure out how to set up one of the other programs the right way.

Thanks for any advice you might have.