@Wayne
So, I haven't tried any of these with Windows 10, but you can give them a shot. There are quite a few of them if you Google them. They aren't all straightforward unless you have had three glasses of wine. Not even sure they can fix them. Some just clear the password. Some allow you to make a new password from within the bootup disk. And, some allow you to make a new user and password, which would seem like the best bet if you have an issue.
Method 1 Method 2 Method 3
