0xN35T:
Because of lack of images, here is the link http://www.instructables.com/id/Arduino-Driver-set-up/?ALLSTEPS
That is probably all correct (language issues aside) but applies to the Uno or mega rev3 driver, not the FTDI driver that the nano board uses. I noted that the FTDI website has an updated windows 8.x FTDI driver available for downloading. That is probably the path the OP needs to look into.