Antares is a virus that infects Windows .exe files.


When executed on any day other than the 30th of a month, it displays an edited version of Minesweeper. However, when it is executed on the 30th of a month, the game is accompanied by a yellow biohazard symbol formed by a very large number of "caution" triangles stacked on top of each other.


Antares Windows Virus

Antares Windows Virus

Credit to Danooct for making the video.