Hi, I have a dell XPS 13' laptop, I have had it for 6 months or less. I have PIN code set up on my laptop, recently I don't know why maybe it was an update. But my laptop has changed to Pin to an unknown password. I need to fix this quickly and i really don't want to reformat the OS. Please help, if it is tedious i can communicate over Skype. If not put instructions below, thanks.