Please can you tell me in details what's the steps, because I have the exact same problem, and I can't use the dell venue 8.1 key to install windows again.
So what's the solution??
Ramiran2ok you need to download the torrent iso of windows 8.1 but you will not be using the hacked but the not hacked one so I don't think Microsoft will care
And if I were you, next time this happens I would consider simply doing a reset of the system. I do it regularly on most of my systems so they're fresh and speedy.
Ramiran2well you cant