When I restarted my computer today, the problem came back. When I maximize a window, it does not fill the screen.
In one of your replies, you said the Windows version I had was a preview version. This morning, I did a clean install of Windows. Before starting I wiped the drive and deleted the partitions. When I did the Windows updates, I did not install the Preview update. I installed Start 11 v2 and I am having the problem still.
These are screen shots of Winver and the full window. As you can see on the full screen picture, when I maximized the window, it does not fill the screen. There is a gap at the bottom.

