Uninitiated search box opens while typing

Hello My OS is Linux Zorin Core 16 distro. Often while typing the window I am in will minimize and the search box appears. This is startling the first times it happens, but I have found that all I need to do is Esc out and my window comes back again. It's just that I never know when this will happen. Just wondering if anyone else has had this problem come up and what they did about it. My laptop is an Acer Aspire E 15 . Thanks.