If you want to shut down your computer one hour later, you can:
1. Click “Start” > “Run”
2. Type in “shutdown -s -t 3600”
3. Click “OK”
Your computer will shutdown after an hour (3600 sec = 1 Hour)
Actually, shutdown command can accept different optional parameter.
-l Logoff current user
-s Shutdown machine
-r Restart machine
-a Abort shutdown. Use this option to cancel shutdown.
-m [\computername] Specify the computer shutdown command applies to
-t xx Shutdown command will be run after xx seconds. If not specify, it is set to 20 second by default.
-c “message” Message shows in the Shutdown dialog