<t> Easiest thing to do is move the position of your taskbar and then drag the window back.<br/>
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Right click on the taskbar and go to "Settings". Then in the settings window change the taskbar position by using the "Taskbar location on screen" drop down. Move it to one of the sides, drag the ...

<t> Just wanted to say I'm seeing the same thing. It started happening right around the time I was upgraded to a new Windows 10 insider preview build. I'm currently on Build 16251. <br/>
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At first I thought it might be the same issue as the folks with the higher resolution monitors are having ...