When a user tries to open Control Panel / Users and Password, they receive:
You must be a member of the Administrators group on the computer to open the Users and Passwords control panel. You are logged in as <Computer Name\User Name>, which is not a member of the Administrators group.
Specify the user name and password of an Administrator on this computer to continue:
If the user opens Control Panel / Administrative Tools / Computer Management / Local Users and Group, no password is required. The user can create new user accounts.
NOTE: The user can NOT change another user's password and they can NOT place an account into the Administrators group.
This behavior is by design.
You can revoke this right:
1. Log on as a member of the Administrators group.
2. Navigate to Control Panel / Administrative Tools / Computer Management / Local Users and Group and select Groups.
3. Double-click Power Users in the right-hand pane.
4. Select NT AUTHORTY\INTERACTIVE and press Remove.
5. Press OK.