This method is very handy if you have apps that just won’t die, and you want to shutdown.
You can goto: Start->Run and type this in, or you can save one of the lines as a batch file. (In notepad save it as “shutdown.bat” (With the quotes)).
WARNING: This will shutdown your computer and will kill all the processes, unlike the normal way, where it waits for programs like MS Word (Where it askes you to save), this will just continue to shutdown.

Shutdown:
shutdown -s -t 1 -f

Restart:

shutdown -r -t 1 -f

Explanation:

-r/-s Is Restart/Shutdown

-t is Time (In seconds)

-f (Forces the shutdown)

Worth Noting: If you just want to kill an app, you might want to try pskill Put it in C:\Windows
And then type pskill taskname in Start->Run. Eg. If Firefox is frozen: pskill firefox.exe

Steven