Vista - Updating nVidia drivers / nVidia Geforde 9600 GT

Alright, here's the deal.
· Windows Vista Ultimate 32-bit, with SP2 RC.
· nVidia Gforce 9600 GT

Never had problems updating the drivers to their latest versions (downloaded from nvidia.com) until I de-installed Spybot (that crappy anti-spyware thing).

After that, everytime I try to install (after a deinstallation) or update the current drivers nothing happens. Install runs fine, copies files, reboots and voila... same drivers as before.

The only drivers that actually I was able to install were the 178.13 via the internal Windows Update. That's it. If I don't install them, the VGA card is shown as "vgasave" in the Device Manager.

I'm quite fed up with this and planning to reinstall Vista, but backuping everything up is going to be a real hassle, that's why I'm trying to find out a possible solution to this beforehand.

Any suggestions?.
Thanks in advance!

since you plan to reinstall windows, it cant hurt to try this first:

Guru3D - Driver Sweeper (Setup) download from Guru3D.com

Been there, done that.
I also used DriverCleaner.NET; another fiasco.

The best way to de-install a device driver is by using the Device Manager uninstall option. Still, that doesn't works for me.

My issue is quite weird, alright. It's like the files are somehow protected and new drivers cannot be installed, even if they are not installed (WTF).

Guess I will re-install Vista and that's it. Some things just don't have a reasnable explanation while using Windows :-/

EDIT: Solved, I just ran the drivers package "As an Administrator" and it worked. Man, that was a weird thing. Thanks anyways for the provided help!