Previously, in Windows 7, I was able to "restore" a maximized Remote Desktop window by dragging the blue tab from the top of the screen down toward the middle. (Restore is the term for visible but not maximized.)
This feature is still available on my laptop and on my home machine--just not on my work machine. I would uninstall recent updates (.NET Framework 4.5.1 and a 4.5.1 security update); however, it is a work machine and I would prefer not to uninstall updates, if possible.
Note that I can still drag down other maximized windows (Word, Excel, Outlook, Visual Studio, etc.)
I tried checking Windows | Accessibility | Prevent windows from being automatically arranged... and then back off again but it didn't make any difference.