File Explorer has two context menus

Let's put it this way then.
Something is affecting your PCs that (it seems) no one else is reporting.
I.e. if you had a clean installation, you wouldn't expect to see it happening.

The nearest you can easily get to that is Safe Mode- try it.
The next nearest is a clean boot, with shell extensions disabled.

More generally: some possibilities:
You have a unique copy of Windows
Your Windows is corrupted on all your PCs (if this appears on all)
You have installed sthg on each of your PCs that causes this
You have some unusual combination of settings on your PCs

Which do you prefer? Or can you suggest any alternative possibilities?

Hi, good that you see a difference in Safe Mode. So given that on your tablet you can see that difference, that alone says either
a. drivers (esp. graphics) - you'd have a new set of drivers having upgraded to '10
or
b. the effect of possible conflicting programs (which you've discounted).

Therefore should the problem arise again, suggest reverting to older graphics driver, which you'd have to protect from Windows update (see Tutorial section).