shutdown [{-l|-s|-r|-a}] [-f] [-m [\\ComputerName]] [-t xx] [-c “message“] [-d[u][p]:xx:yy]
-l : Logs off the current user, this is also the defualt. -m ComputerName takes precedence.
-s : Shuts down the local computer.
-r : Reboots after shutdown.
-a : Aborts shutdown. Ignores other parameters, except -l and ComputerName. You can only use -a during the time-out period.
-f : Forces running applications to close.
-m [\\ComputerName] : Specifies the computer that you want to shut down.
-t xx : Sets the timer for system shutdown in xx seconds. The default is 20 seconds.
-c “message“ : Specifies a message to be displayed in the Message area of the System Shutdown window. You can use a maximum of 127 characters. You must enclose the message in quotation marks.
-d [u][p]:xx:yy : Lists the reason code for the shutdown. The following table lists the different values.
| Value | Description |
| u | Indicates a user code. |
| p | Indicates a planned shutdown code. |
| xx | Specifies the major reason code (0-255). |
| yy | Specifies the minor reason code (0-65536). |
/? : Displays help at the command prompt.