would be nice to have an option for windows shutdown after completed running tests (local/networksuite).
Have a option in Test Complete to shutdown the system Sys.Shutdown().
Just put this code event handlers like OnStopTest then after completion of test system will be shutdown.
Some helpers on Event handlers here
Some helpers on Shutdown here
NOTE: If you put Sys.Shutdown in your handlers every time you run the test system will get shutdown when execution over.