Hi everyone,
I'm using an Arduino Nano and I'm on Windows 8.1. When I first connected the nano to my computer it was working fine until it suddenly stopped working !
The PC doesn't recognise the arduino, I can't chose the port (it's in grey) ; I assume this is a driver issue..
When opening my drivers window, I can't find any unknown device !
Does anyone have a tutorial or something ? I tried looking on the web, quite unsuccessfully.. 
Thanks a lot for your answers ! 