Set Top Box
Media Center can control your set top box if you have a Media Center Remote and transceiver.
Go to MC's Tools > Options > Remote control. There click the "Next >" button. That will show you a page called "Selection". Uncheck all (unless you also want to set up other things) except the last item, "Set-top box numbers" and press Next >. Now you are ready to have MC learn your Set-top box codes. Keep pressing the requested number button [b]on the remote provided by your cable or satellite company [/b]until that button is learned.