Hmm, sounds strange. Have you tried a refresh of the PC?
Should be in Settings > Update & Security > Recovery > Reset this PC and click Get Started.
Hopefully this will work for you. I've had this problem on my Acer Iconia W3-810 (although unsupported by Acer, it runs Windows 10 Pro) and a reset solved the problem or reinstallation of drivers, but as far as I'm aware, I don't know if there are any driver packages for the Surface Pro 3 available, only the firmware updates provided by Microsoft via WU.
10-10-2015 01:50 PM