Make a trojan virus

This is actually not a virus but a trick to fool your friend. They will understand that this is a virus.
Open the notepad and paste the following code.
save it as "trojan.bat".

x=msgbox("Hi!!! Your computer is under risk. It contains viruses that cant be removed by your antivirus software." , ,"Trojan detected...")


Send this batch file to your friend. He will get surprised that his PC is affected by trojan horse.