As a kid my favorite screensaver was the Virex module for After Dark which would show a cool animation of it scanning your files for viruses icon by icon
Johnny Castaway [0] for the win! Loved this adaptive screensaver. There was something always mesmerizing about it.
Cool back in those days but in the age of ssd defrag is pointless. Even if you make your files contiguous the wear leveling algorithm still puts all the blocks all over the place. It only causes more wear.
The defrag tool in windows is smart enough to do a TRIM on SSDs instead, at least since Windows 8 I think.