Quote Originally Posted by Mokoto View Post
If you're a bit more advance I suggest deleting the driver via the Device Manager before you re-install. To do this go to the Device Manager, expand the "Display Adapters", Right click on the "Nvida GeForce GTX 560Ti", select "Uninstall". A prompt will confirm, and have a option to "Delete the driver software for this device", check that box then hit "OK" Close the windows once it's done. Restart the computer with your Lan/wifi disconnected so that windows does not automatically download software from it's servers. Then open the file you got from Nvidia and install the drivers. If this does not solve your problem then you maybe having a hardware failure with the card and it is time to replace it.

Or you can just select perform a clean install in the nvidia installer which does the same thing.