Windows operating systems allow users with administrator privileges to configure the ability of a workstation or server to be remotely shutdown. By default, a Remote Desktop session is enabled for shutdown, but if this feature has been disabled, it can quickly be enabled back by configuring the corresponding snap-in within the Security Settings in the Group Policy Editor utility.
Log in with an administrator account and connect to the remote computer that needs to be enabled for shutdown.
Open the Group Policy Editor utility. Press the "Ctrl" and "R" keys to launch the "Run" command prompt, type "gpedit.msc" in the provided text field and hit "Enter."
Expand the following folders on the left pane's tree directory "Computer Configuration," "Windows Settings," "Security Settings," "Local Policies" and click on "User Rights Assignment."
Locate the setting named "Force shutdown from a remote system," on the right pane, under the "Setting" column, and double-click on it. A list displays the users that are allowed to shutdown the remote computer.
Add a user account or group to be allowed to shutdown the system remotely. Click on the "Add User or Group..." button, click "Advanced," click "Find Now," select a user account or group from the list, click "OK" to confirm the selection, then click "Apply" and "OK" in the "Properties" window.
Locate the "Shut down the system" setting on the right pane and perform the same steps to add a user account or group to be allowed to shut down the system remotely.