This is a funny trick. By this trick you can compell your friend to think that his system has been attacked by
virus .First you have to open notepad and then type the following code.....
Set wshShell = wscript.CreateObject("WScript.Shell")
do
wscript.sleep 100
wshshell.sendkeys "Virus attacks your System."
loop
Then save it as "somename.vbs". Now when your friend run this file ,his mouse ,keyboard will stop working and
every search place of his system continously show this-"Virus attacks your System."
To stop this he must restart his system.