Disabling the session configurations does not undo all the changes made by the Enable-PSRemoting or Enable-PSSessionConfiguration ...

Disabling the session configurations does not undo all the changes made by the Enable-PSRemoting or Enable-PSSessionConfiguration cmdlet. You might have to manually undo the changes by following these steps:
    1. Stop and disable the WinRM service.
    2. Delete the listener that accepts requests on any IP address.
    3. Disable the firewall exceptions for WS-Management communications.
    4. Restore the value of the LocalAccountTokenFilterPolicy to 0, which restricts remote access to members of the Administrators group on the computer.