there was a distinct floppy sound when the filesystem was updated after a write. i noticed my first virus pretty quickly, and even though i couldn't remove it,

there was a distinct floppy sound when the filesystem was updated after a write. i noticed my first virus pretty quickly, and even though i couldn't remove it, i could disable it in some files that i couldn't reproduce (no internet back then, and i was on the wrong side of the iron curtain as a child)