I've spent all morning on this, and I'm no closer to a solution, so I'm hoping someone here has seen this issue.
On my work PC (Windows 7), there's one program that will ONLY display on my main screen and can't be dragged off of it. All of the other windows can be dragged around and placed wherever I want them, but this one specific program can't be. If I shrink it down to less than full-screen size and attempt to drag it off the monitor, it instead resizes to fill the half of whichever side of the screen I tried to drag it off of. (So if I try to drag it to the monitor to the left of the main screen, it becomes a half-screen window on the left, or if I try to drag it to the right, the same thing happens, but on the right side of the screen.)
Switching the primary monitor to a different screen in display settings moves the app with the primary screen, but it remains trapped. The Shift-right click menu Move option doesn't get around the problem, either.
Google searches for the problem are coming up dry.
Can someone help me with this? I've never seen anything like it, and I work in IT...