nVidia driver made everything worse

> I've tried a couple of times in the past to upgrade the driver for my 7600GS
> from the nVidia web site. They've been dreadful: buggy, unfinished, and for
> some reason slower than the one that came "in the box" with Vista (apparently
> itself an early nVidia driver).
>
> Anyway, Windows Update offered to update my driver yesterday, so I thought "If
> Microsoft have put it on their server, it must be a good 'un."
>
> Well, it isn't! Now the screen keeps flickering and getting funny tears
> across it, the graphics score in Performance Monitor has actually fallen, and
> the bubbles in the screensaver move in little jerks, rather than smoothly as
> they did before.
>
> This is pathetic. Anyway, I cured it with a System Restore, and now all is
> fine again.
>
> What is up with nVidia. Are they incompetent? Or is it my machine? (It's a
> perfectly ordinary Gigabyte mobo with E6600 and 2G RAM, nothing else plugged
> in.)
>
> Has anyone else had this problem?
>
> Steve
>