Command line to: Lock Desktop; Log Off; Reboot; and Shutdown

# Lock Desktop #
%WinDir%\system32\rundll32 %WinDir%\system32\user32.dll,LockWorkStation

# Log Off #
%windir%\System32\Shutdown.exe -l -t 5 -c "Logging off from system in 5 seconds"

# Reboot #
%windir%\System32\Shutdown.exe -r -t 10 -c "Rebooting system in 10 seconds"

# Shutdown #
%windir%\System32\Shutdown.exe -s -t 10 -c "Shutting down system in 10 seconds"

# Abort #
%windir%\System32\Shutdown.exe -a