Windows 10: How to sign in to Windows 11 without another person's username?

I bought my desktop computer over a month ago, but it turns out it has another person's username. I think this is reason why files I downloaded to my computer photos, audio files have disappeared. What can I do to change the username to my own? Is there some way I can talk to a human? I am using Windows 11. Thank you.

:)

 

signing into Window

Hi Karen,

To address this concern, we suggest that you follow these steps on how to change your Sign-in option in Windows 10 PC:

• Click Start, and then type netplwiz.
• The command will appear as a search result in the Start menu search. Hit
  Enter on the result to open it.
• User Accounts will appear. Select your user account and uncheck "User must enter a username and password to use this computer."
• Enter your user account's password then click OK.

Note: If you are using a Microsoft account to sign in, you need to enter the full email address in the username box.

Let us know how it goes.

Thank you.

 

Usernames or logon IDs shown before signing in to Windows 10

Could be in Settings/Accounts/Sign-in options?

 

Usernames or logon IDs shown before signing in to Windows 10

I has enabled in group policy to hide the usernames or logon IDs before signing in to Windows 10 but even after a GPUPDATE /FORCE and a reboot, the usernames are still listed on the actual logon screen UI before signing in to Windows 10. The policy does not seem to take effect. I set the policy back to Not Configured until we see why this will not take effect. I am on a Standalone machine.