I've always been a big fan of..
Uninstall -- Reboot to Safemode -- Run Driver Sweeper -- Reboot to normal windows & install new drivers.
But I'm just paranoid like that :'(
Would that work for AMD video card as well?
"Updating" or installing over existing Nvidia drivers works fine, but problem is the old driver is backed up in windows driver store (C\Windows\System32\DriverStore\FileRepository). So for roughly every 10 drivers, the back ups grow by over 1gb. Uninstalling the driver ensures it doesnt get backed up.