Windows 10: Black Window Stealing Focus

First off, from what I can tell this is some sort of window. Windows can display over top of it, but only by bringing up or forcing the OS to show a window or item by hovering mouse over taskbar icon. The black window also is not fullscreen as anything being displayed behind it can be visible as a border around it (1 pixel on all sides).

I can't really say what is causing it. I have disabled searchapp.exe as it seemed to be randomly stealing the focus and it was being reported as the culprit by Window Focus Logger. Unfortunately it still happens from time to time, but focus logger now says it's Explorer.exe taking focus. I have tried terminating and disabling processes and services trying to determine what it is. The only way to remove it is to restart the computer. When doing so, before windows shuts down, the black window does close which suggests to me there is a process behind it.

Windows 10 Home Version 20H2 (OS Build 19042.804)

I will do what I can to provide any information request.
I am attaching 2 images, the first being what is displayed when it happens.

Any help would be greatly appreciated.

:)

 

Windows Updater Steals Focus

When playing games via Steam every hour or so the game would mysteriously minimize or at the very least drop out of full screen for a couple of seconds. After a lot of research and debugging I was able to track the problem down to Windows Updater stealing
focus. This is really problematic behavior as it can have very unfortunate consequences in any real-time game. Is there a way to prevent Updater from stealing focus or stop it from running while I'm playing games?

 

Windows Updater Steals Focus

Anothing thing to try is going into "Services.msc" and finding "Windows update" service then setting it to off. See if it continues to turn on and steal focus after that

 

Preventing applications from stealing focus in Windows 10

There is a dated question asking for a solution for windows 7. I have recently grew tired of newly launched applications to steal focus from my currently opened window. Is there a way how to prevent programs from stealing focus in Windows 10?

Thank you