I have some strange gray square above strat mennu input.
How I use start menu:
I press windows
key on my keyboard ant start typing software I want to run.
So, when I press Windows key, I see normal start menu.
When I type, I see big gray sqare above input box.
When I press tab
button to move focus to another element (such as buttons in top menu), this gray square disappears. If I continue pressing tab
to return focus to input, gray square appears again.
I think it is part of input box for something like suggestions. What is is and how can I remove it?