This isn't (now) a real issue, but am curious as to what happened. Before the 10 upgrade mess, my account was a Microsoft Live account. When I upgraded to 10, I did something and had to logout. When I tried to log back in, my account used my hotmail account. That's when I had to use the Macrium backup for 8.1 because I didn't have the password for my hotmail account. BTW, it didn't change my PIN number. Go figure.