Are you saying you are not able to update the driver? Are you able to remove the driver? If so, you can use Guru3D to remove traces of NVidia, then reinstall video driver.
Guru3D - removes leftover traces of drivers for NVIDIA (Display and Chipset), ATI (Display), Creative (Sound) Realtek (Sound), Ageia (PhysX) and Microsoft (Mouse)
Systems 1 and 2: Windows 7 Enterprise x64, Wi...System 1: i7 [email protected], System 2: AMD FX-41...System 1: 8GB System 2: 8GBSystem 1: ATI FirePro V4800 System 2: Radeon ...
Computer Manufacturer/Model Number
Dell and Custom
OS
Systems 1 and 2: Windows 7 Enterprise x64, Win 8 Developer