Hi Michael,
I'm an Independent Advisor and I'm happy to help you.
The command "net localgroup administrators" simply lists all the users who have administrator privileges on your system. However, if you do not have access to the account "mlth_xxxxxx" (meaning you do not know the password or cannot log into it), you will not be able to use it directly.
If this account belongs to you but you lost administrator rights, you can try the following:
A.- Restart in Safe Mode with Command Prompt.
- Restart your PC and press F8 or use Shift + Restart from the login screen.
- Go to Troubleshoot > Advanced Options > Command Prompt.
- Enter this command to enable the hidden Administrator account:
net user administrator /active:yes - Restart and try logging in with the Administrator account.
B.- Check if you can reset the password for the admin user.
- If you can access another limited account, open Command Prompt and enter:
net user mlth_xxxxxx * - If it allows you to set a new password, you can log in to that account afterward.
C.- If you have access to another computer, you can create a bootable USB for Windows 11, use it to access advanced recovery options, and attempt to restore admin access without reinstalling everything.
If none of these solutions work, a clean installation of Windows 11 will be necessary.
Let me know if this helps! :)