Authenticated users are those who are able to sign into Windows 10 on the computer.
Press Windows key + R
Type: control userpasswords2
Hit Enter
Are there any other users on the computer?
If you recently updated to Windows 10, try the following:
Open Start > Settings > Accounts > sign-in options
Scroll down to Privacy
Toggle off
Use my sign-in info to automatically finish setting up my device after an update or restart.