I need to install my Arduino drivers, but Windows 8.1 doesn't seem to like Arduino, and it greys out the update driver button. Therefore I can't select the drivers from the drivers folder in my Arduino IDE folder.

A guy said that there are drivers needed to be installed. But Windows is being a pain in the butt and greys out the update driver software. Also, it refers to Arduino Uno as 'unknown device' if that helps. How do I install the Arduino drivers and make Windows let me install the drivers?