"Don't forget the souls who save everything to desktop."
My sister does that on her Win-ten laptop. She had so many icons that there was an overflow and Windows helpfully created a folder on the top left corner into which it stuffed some of them. Every so often when the desktop was refreshed after closing a program the set of displayed icons would re-arrange themselves and some would be foldered while others escaped.
I don't think it actually deleted anything but with her entire desktop covered in "Bills.pdf" I could never be sure.
As a (quite temporary) workaround, I moved *everything* into new folders called "Sister'sStuff" and "Tools" but I'm fairly sure she'll ignore the hint.