Black Icon Underlay?

I have this black "underlay",
(see image below).
It appears form time to time,
on various folders within Windows Explorer and also on sub-folders as well.

Any idea what this is and why it's happening?

MikeMecanic said:

Try this tool :


http://www.thewindowsclub.com/icon-c...for-windows-10

@MikeMecanic

Thanks for the link.:)
I 'm aware of the manual icon-cache rebuilding process within windows 10,
but it's always been quite irritating for me to implement.
This tool should come in handy.
If I could only figure out why this happens in the first place.
I would avoid or try and keep form doing such.
However, this does seems to be a very elusive peculiarity.
Thanks again.

MikeMecanic said:

If you are not comfortable with the app, you may try it manually then. It's up to you!

http://www.thewindowsclub.com/rebuil...che-windows-10

@MikeMecanic

I reiterate...

"I 'm aware of the manual icon-cache rebuilding process within windows 10, but it's always been quite irritating for me to implement".