Hi
No not necessarily, but the fact that it was the same in Windows 8 and 10 would lead you to think that it's not related to the OS.
It seems more likely that it has to do with hardware.
But it doesn't make sense that it only shows up in the form that it does either.
Why only effect the user interface, in one particular way?
How many places do the pages appear with the same visual appearance?
You could try opening the Administrator command prompt and typing in...
SFC /scannow
There is a space after the C.
It will check all of your system files for errors.
You could also try changing the desktop theme on the off chance that it will effect it somehow.
It's also strange that you can see it but the screenshot doesn't.
Either it's blinking and the screen shot hits when it's not there or, I have no idea?
Mike