Vista and Win7 are certainly not immune to "forgetting" DLLs behind when uninstalling or rolling-back software updates.
The system restore should clean up that sort of problem however, even in XP.
I'd suggest three things:
1) See if you can get an explicit manifest of all the files touched by the driver update. Uninstall your current drivers, reboot in safe mode, hunt down any files on that list and manually delete them wherever they may be, reboot in normal mode, and then reinstall with last-known-good. (Actually, if you just did a rollback, instead of a complete uninstall, try that anyways even without the deleting)
2) Stalk the nVidia website looking for beta driver updates or new stable driver updates - if it is a driver issue, a new version may correct it. When you find one, unintstall the old drivers, reboot, clean up manually anything you find left over, install the new ones, hope.
3) Entertain the possibility that it actually is hardware beginning to go bad. A couple of bits in the RAM on your video card may have barfed. There are some utilities that test motherboard RAM, I'm not sure if there's an equivalent utility for video RAM though.
no subject
The system restore should clean up that sort of problem however, even in XP.
I'd suggest three things:
1) See if you can get an explicit manifest of all the files touched by the driver update. Uninstall your current drivers, reboot in safe mode, hunt down any files on that list and manually delete them wherever they may be, reboot in normal mode, and then reinstall with last-known-good.
(Actually, if you just did a rollback, instead of a complete uninstall, try that anyways even without the deleting)
2) Stalk the nVidia website looking for beta driver updates or new stable driver updates - if it is a driver issue, a new version may correct it. When you find one, unintstall the old drivers, reboot, clean up manually anything you find left over, install the new ones, hope.
3) Entertain the possibility that it actually is hardware beginning to go bad. A couple of bits in the RAM on your video card may have barfed. There are some utilities that test motherboard RAM, I'm not sure if there's an equivalent utility for video RAM though.