This will show you how to create a Remote Shutdown Dialog
shortcut to be able to shutdown or restart one or more remote networked computers \\ComputerName
all at once.
You must already have administrative privileges
on the networked computer to be able to do so.
If you’re on a home network, the best way to do this is to make sure all computers are in the same workgroup and that they all have at least one Administrator account with the same user name and password.