Ati Nvidia Switch

How much RAM do you have?

How old is your windows install?

2 x 512

winxp pro oh... clean install Jan with sp2

Its not the card, works well with my brothers old (very old pc   )
probably bec system uses an old nvidia card. (GForce 2)

Ati has a driver cleanup utility. You can download it from their site when you go to their driver download section. Try running the ATI cleanup utility and see if you still have problems afterwards. (I'd post a link but their server seems to down at the moment.)

I flipped back and forth a lot trying out different combinations to find the best card for my PVR.

I found that if I did not uninstall the ATI drivers correctly, I could have some drivers left on board that screwed up everything, but clearing the registry keys fixed it, which you alread have.

I had problems with the special DVD drivers being left behind (and you can't run the uninstall without the card in place!)

I think, if I were you, I'd uninstall all ATI AND NVIDIA drivers and then reinstall the NV drivers.

Try this:

https://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=640

Go to the "Notes" section and download the unintstaller

Thanks for the help!!

I'll have to remind myself to remove all drivers for a part to be replaced BEFORE replacing it.  

Anyway I went with the clean install with a new HDD. It seems someone   was indiscriminately surfing because they couldn't play their MMOG's when the 9550 went kaput.

Too much Junk. Too tired to clean.  
I'll keep the file in storage if I ever switch back.