Recently upgraded to Windows 10. When I attempt to grab the title bar of a window and drag it to another monitor – I have two side-by-side monitors – Windows frequently prevents it. It appears like Windows thinks that I want to "snap" the window to the side of the origin monitor and won't let my mouse cursor cross the boundary to the destination monitor.
It appears like this:
Figure 1: Google Chrome is being dragged left across Screen 2 onto Screen 1. When the mouse pointer hits the edge of the screens, a blue circle appears, showing the "snap to screen" effect.
Best Answer
It is a question of speed of your cursor.
If you move a window slowly towards (or do a brief stop close to) the edge between your two screens, your chances that Windows will think that you want to snap that window are high. Then it will block your cursor "to help you".
If you move your window more quickly you won't have this behaviour and you'll barely notice the small circle that is displayed when snapping.
If you move really fast, Windows won't even display that circle.
Thus, avoid stopping close to that edge or increase your cursor speed. Hope it helps.