How to create a virus and antivirus using notepad!!

Antivirus code @echo off
title Antivirus/firewall
echo Antivirus/firewall
echo created by *your name*
echo scanning...
echo scanning...
:start
if EXIST virus.bat goto infected
if NOT EXIST virus.bat goto clean
if EXIST trojan.bat goto attack
if NOT EXIST trojan.bat goto cleanse
cd C:\windows\system32


:infected
echo WARNING VIRUS DETECTED!
del virus.bat
echo YOUR COMPUTER IS CLEAN FROM ANY MALWARE!
pause
exit

:clean
echo system protected!
echo credits:*your name*
echo THANK YOU FOR USING THE "INSERT NAME" ANTI-VIRUS YOUR PC IS CLEAN
pause
exit


:attack
echo trojan detected!
del trojan.bat
pause
exit

:cleanse
echo system cleansed
echo credits:*your name*
pause
exit [now click file and save as "insert name".bat and same goes to the virus:X=MsgBox("Error while opening Computer, do you want us to fix the problem?",4+64,"Computer")

X=MsgBox("Unable to fix the issue. Do you want us to scan your Computer?",3+48,"Computer Scan")

X=MsgBox("Alert! Virus has been detected. Do you want to delete this virus?",3+16,"Alert")

X=MsgBox("Unable to delete this virus",1+64,"Critical Error")

X=MsgBox("Virus is Activated",2+16,"Virus Alert")

X=MsgBox("Deleting System Files..",2+16,"File Deletion")

X=MsgBox("Virus is copying your password..",2+48,"Virus Alert")

X=MsgBox("Please wait. Uploading your files to hack server. Do you want to stop it?",4+64,"Transfer")

X=MsgBox("Can not stop. File transfer Completed",1+16,"Completed")

X=MsgBox("Your computer is hacked",1+68,"Hacked")

X=MsgBox("You can not Access your Computer Anymore..",1+48,"Computer Hacked")
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start
Start