Hi crabfatblue
I am Juliet and It's my pleasure to help you today.
How are you? I hope you are doing good.
I know how frustrating this may be for you but I'll do my very best to help you :)
To change the account name using the User Accounts settings on Windows 10, use these steps:
- Open Control Panel.
- Under the "User Accounts" section, click the Change account type option.
- Select the local account to change its name.
- Click the Change the account name option.
- Confirm the new account name for the Sign-in screen.
- Click the Change Name button.
- After you complete the steps, sign out of the current session, and the Sign-in screen should now display the new name.
I hope it helps! Let me know the results.