In 1990 I also edited a friend's autoexec.bat to launch a quick basic script that would falsely check the disk for viruses and then prompt the user to delete th

In 1990 I also edited a friend's autoexec.bat to launch a quick basic script that would falsely check the disk for viruses and then prompt the user to delete their entire hard disk. Of course pressing "n" would print "y" on the screen and then display a fake progress bar along with a warning to not interrupt the operation in order to avoid disk damage. I definitely had too much free time at the times. :)