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Windows 10 - Surface Pro 4 with Surface Dock and 2 external monitors - cannot drag anything to one external monitor

Last Modified: 2015-12-27
Hi Experts,

I’ve got a  Surface Pro 4 running with a Surface Dock and 2 external monitors.

Looking at Advanced Display Settings:

Clicking Detect shows:

monitor 1 is the Surface Pro
monitor 2 is the Left external
monitor 3 is the Right external

Multiple displays is set to:  Extend these displays

My problem is that I can drag apps and windows between monitor 1 and monitor 3.

But I cannot drag anything to monitor 2 (it just shows the standard Windows 10 background and nothing else).

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