Stuck on the App screen, not able to get to desktop

Ok, I have looked for the solution to this problem, but all my searches find a different issue. This has now happened to 2 HP Windows 10 laptops. My son has grabbed them, and hit something, so now, the desktop is gone. It only displays a list of apps, similar to the Windows 8.1 main screen. When you select a new program, either from the app view that it is stuck in, or hitting the widows button in the lower left, and opening a new program, I see the desktop for maybe a second before the app/program opens. When you close it, it goes right back to the app view. I have seen "fixes" everything from the Windows key+D to reset to factory settings. I have added a "show desktop" icon to the task bar, but when you hit it, the desktop shows for a second, then right back to the app view. Any help would be appreciated.