Michelangelo is a very well known virus. The name was given to it by a researcher who noticed that its trigger date was the same as Michelangelo's birthday, 6 March (1475), although there is no evidence to suggest that this was the virus writer's reason for choosing that date.
On hard disks Michelangelo overwrites the first 17 sectors on every track of the hard disk, heads 0 to 4. On 360K floppy disks it destroys sectors 1 to 9, heads 0 and 1. On other floppy disks it destroys the first 17 sectors of each track.