I have a WPF window which appears on the bottom right of the screen above the taskbar with topmost set to true. Some Windows7-users reported that when they open the window via the tasbar menu icon, the Windows taskbar settings window appears above the app window (doesn't happen on Windows10).
To show what happens, i made a gif:
On the same machine, the DropBox pop-up shows above the Windows taskbar settings window. Any ideas how to solve this?