I have several computers throughout my house, all on the same network. I am trying to set up basically a command center in my main computer, a windows 8 laptop, via command prompt. I want to be able to just use simple commands such as "shutdown -i', and everything appears to work fine until I receive an "access is denied.(5) every time I make an attempt. Are there settings I need to change on each computer, or just the command computer, to make this option accessible?