I'll say at the outset that this isn't so much a request for support in the conventional sense as it is a request for expert opinion.
Ever since upgrading to Windows 10 when it first came out, I have been encountering a very occasional, yet recurring, behavior with my desktop icons that I find mystifying. In all cases it involves them being overlaid in the lower left corner with a "mini-icon" that's the same size as what you see for the actual shortcut arced arrow that should be there.
This morning all of my icons had a "stipple gray" X in that position. At other times it has been other things, but the exact what I cannot recall at this moment. In all cases a system restart puts things right back to normal.
What on earth triggers this sort of behavior? Is there anything I'm doing to trigger it or that I can do (or stop doing) to get it to cease and desist?