
As stated here: http://micropython.org/doc/tut-repl. Installing drivers on win 8.1 is not that straight forward since the driver is not signed.
Driver Signature Enforcement must be deactivated first. once that is done you can install the drivers, I used the "let me pick from a list...." method to install.
If anyone is interested I can create a tut on it, but first i gotta play with my board =)