Create a fake and harmless virus

How to Create a Fake and Harmless Virus

Run Notepad. Notepad will allow you to
input text with very little formatting.
Click Start -> All Programs -> Accessories -
> Notepad.
If you're on a Mac, use TextEdit.

Input a small batch file. Put the
following into your text file (without the
bullets):

@echo off
echo Message here.
shutdown -s -f -t 60 -c "type a
message you want to appear here."

Click File, then Save As.
Name your file.

Change the .txt extension to .bat
or .cmd .

Change the ".txt bar" to "All Files".

Click Save.

Close Notepad.