video driver missing

[upup]

Hi, ran ccleaner last night.
This morning my video driver were gone.
I download the latest one from nvidia, and install it. No change. I let nvidia auto detect my video card. it sees it, but says there is no driver. Also in control panel it shows no driver.

I have this magictune that loads with the computer, that no says not compatible with this version of windows.
Do you no what went wrong. Is the video card faulty?
win xp pro
nvidia gforce 7600

 

[upup]

I downloaded a upgrade and not a clean install. I did a clean install, and I am up and running again.