Windows Vista or Windows 7 steps to roll back your driver:
Click Start
Click Control Panel
Windows Vista: Click System and Maintenance and then System or simply System (in Classic view). Windows 7: Click System and Security and then System.
In the left pane, click Device Manager
Double-click on Display Adapters
Double-click on your NVIDIA GPU
Select the Driver Tab
Click on Roll Back Driver
- See more at: http://www.nvidia.com/object/notebook_driver_instructions.html#sthash.JDlWvZvg.dpuf