I remember a similar April's fools joke at one of my old workplace. This was the late 80s. Well, one morning, when I booted up my computer, it echoed out a mess

I remember a similar April's fools joke at one of my old workplace. This was the late 80s. Well, one morning, when I booted up my computer, it echoed out a message like "your computer has a virus" or something similar. The message was also showing up on a number of other computers. It caused panic and confusion in my workplace. It was a small company and computer knowledge was lacking. We shut all the computer off and called in some computer specialist to checkout the problem. It turned out that someone has modified autoexec.bat to echo the string out as an April's fools joke. Well, the manager was not happy and it caused the company a bit of money to recover. I think the person who did it was given a dismissal warning.