what is the model of your video card?
did you try to install the driver from the CD that came with your video card?
is your VISTA 32 or 64 bit ?
can you please try this link
just click on the link and install. this is the most recent version.
let's see what happens.
sorry, there was a problem
can you try this link to download your driver
select option 1
hello again sir,It will be better for me to opt out, because I am out of ideas. Let me redirect you to another expert. If nobody opts in back, we can continue together again. Regards