Driver issue Arduino nano (Windows 8.1)

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 ! :)

Just a few suggestions.

Arduino troubleshooting for beginners.doc (372 KB)

Thanks mate ! And merry christmas ! :)