I have my mac running dual boot with Windows 10. I have had windows on it a long time, and need to do a full factory reset of my windows partition(of course I have moved all the files I need to save on to an external drive). I created a "Recovery Drive", and am trying to use "Recovery-->Reset This PC", but I get the error that recovery environment was not found. I have the recovery drive connected right into the USB port(not through a HUB). I have a win7 code that I THINK I used when I first installed it, but I am not sure it will work.