NVIDIA Driver Removal Installation:
-from NVIDIA help <- Link

When an NVIDIA display driver update is performed, the new driver will remove the previous drivers during the installation processor. Sometimes it is not successful in removing the older display drivers which can lead to display issues later on as a result of conflicting drivers. As a basic practice, it is recommended that you first uninstall the older display drivers before updating to a newer version. To uninstall your current NVIDIA Forceware display driver from your system, please follow these steps:

1) Open the Microsoft Windows Control Panel
2) Double-click the Add/Remove Programs icon
3) Depending on which driver version you are using, your graphics drivers may appear in differently in the list of programs installed.

-For older NVIDIA display drivers, it will be listed as "NVIDIA Windows Display Drivers". Click "Change/Remove" or "Add/Remove " button to remove the drivers from your system.

-For newer display drivers, it will be listed as "NVIDIA Drivers". Click "Change/Remove" or "Add/Remove" button to remove the drivers from your system. If your PC features other Windows components, then Windows will list the other NVIDIA components installed as shown in the picture below:

Choose "Remove only the following" and then click "NVIDIA Display Driver" and finally click on the "Remove" button.

4) Confirm with Windows that you wish to continue with the uninstall

Note: A prompt appears asking whether you want to delete all of the saved nView profiles. If you click Yes, all of the nView software and all of your saved
profiles will be deleted. If you click No, the nView software is removed, but the profile files are saved in the Windows\nView directory on your hard disk. If you take advantage of the nView profiles, you may wish to keep your custom nView profiles.

Once the driver files have uninstalled, Windows will request that you restart your computer to complete the uninstallation.

Installing the latest drivers:

Drivers can be downloaded from nVidia.com