Startup user is not in user list

At startup Win 10 quickly goes to a user and says "The user name or password is incorrect. Try again". I click OK and then select the proper user from a list on the left of the screen, then click "Sign In" and everything is fine. That first user is not in my list of users. How do I stop that first user (non-user) from showing up at startup and, instead, startup with the desired user?

Brink said:

Hello mwr, and welcome to Ten Forums. :)

It sounds like you used netplwiz to setup Windows to automatically sign in to the account at startup, but entered an incorrect password in netplwiz.

Checking the Users must enter a user name and password to use this computer box, should stop this for you.

Sign in User Account Automatically at Windows 10 Startup Windows 10 User Accounts Tutorials

Thanks, but (1) I'm not at all clear how to do that and (2) the user a want at startup doesn't require a username and passoword.

Thanks so much. That worked1