Brian, it is best if possible, that you reply with your original user, so that I can get notified if you reply in this thread.
Regarding switching account linked to Windows, this is what you do:
Go to Settings > Accounts > Your info
Click on Sign in with local user instead. follow the steps and finish the rest.
(If you don't see the "sign in with a local account instead option, click on "Stop signing into Microsoft apps automatically" first, then relaunch this page. )
Restart the computer (Do Not skip)
Go to Settings > Accounts > Your info
Click on Sign in with Microsoft account instead. follow the steps and finish the rest. This time use the Microsoft account you want to use.
Restart the computer (Do Not skip)