The best way to uninstall NVIDIA drivers is to use the NVIDIA Clean Install Method through the latest drivers.

To completely uninstall drivers, NVIDIA and EVGA recommend using the NVIDIA driver to uninstall previous drivers. To do this you can download the latest NVIDIA driver from NVIDIA or EVGA.

Once you select the proper driver, run the installer. Select Custom Install, then Perform Clean Install. This process will completely erase all previous NVIDIA drivers and install the latest version.