Easier solution. Move your mousepointer to an empty area on the desktop, right click and choose refresh. They disappear!
Two things:
a) I do NOT have any Norton products on my PC
b) Mine appeared during a grueling 10 hour data transfer, moving the auto back up files off my auxillary drive and onto my server. I think one of two things happened - 1) The computer just got overwhelmed with doing too many things at once and/or 2) It
checked programs off as the back ups were moved. I am more inclined to thing that the 1TB move of data and me using the machine concurrently just overloaded stuff.
In any event, it's an easy fix!