The closest SuperUser question I can find is this one, but the solutions there didn't work for me. I can't think of any application I may have installed that would change this behavior. I found that the ability to toggle 'Always on Top' was removed in Windows 7 and the behavior should be that the taskbar is always on top, but that is not the behavior I'm getting. In my googling, I've only found instances of people trying to go the other way (they want to disable Always on Top), or people talking about the taskbar being on top of full screen applications such has video games or movies.

If I maximize a window, it does size correctly - the bottom of the maximized window touches the top of the taskbar.

How can I do that EDIT: OK, that's weird. I want them to stay UNDER taskbar NO MATTER WHAT. Can't find similar feature on Windows 10 and it's keep bugging me that windows always get on top of taskbar.

All applications are showing up on top of the taskbar, not just a specific application, such as Microsoft Word I remember there was feature on Windows 7 that you could keep taskbar always on top of other windows.

As you can seen in the cropped screenshot below, the non-maximized windows are on top of the taskbar.

My taskbar does not stay on top of applications, even when they are not full screen.

Taskbar staying on top