The graphic card driver that Boot Camp includes is very old, and it's recommended to use the driver that the vendor provides, in your case, from NVIDIA. You can get the most recent NVIDIA driver from the NVIDIA website > http://www.nvidia.com This is important in order to get the maximum performance of your graphic card
I would be careful with graphics drivers from Microsoft update.
Not certain about your system, but on my MacBook Air 2012, the graphics update from Microsoft resulted in a completely black screen. Had to go into Safe mode to uninstall the driver. Some time later, the update re-appeared, forgetting the issues I had, tried again and the same thing occurred. Have now hidden that update