windows drivers stopped working

I am using version 013 I was working one day and unplugged the board from my computer and came back an hour later plugged it back in and the arduino software would not recognize it. Device manager says "this device has stopped working" with a error code 10, and it further said that it "could not load driver software arduino".

I uninstalled the drivers and reinstalled them but it is still giving me the same message. Restarting did not help.

Any help would be much appreciated, thanks.