How to remove a display duplicate in the resolution of the screen?

I had a Windows 7 laptop to an external display connected to it.  My laptop has a resolution of 1920 x 1080, while my external monitor has a resolution of 1920 x 1200.  Initially, I had my external monitor hooked through my docking station, but I've since decided to plug in my external monitor to the HDMI port on my laptop.  When I did this, in the screen resolution Control Panel, I now have 3 screens!  The 3rd posting is currently DISABLED.  But when I decide to have two active screens, I can't do this each with their native resolution with 3rd current display - even if this were not true, I still want to have this '3rd view' deleted.

Therefore, I have 2 questions:

1. how 'remove' the 3rd display twice the screen resolution?  I tried to remove the double 'generic PNP' driver from the Device Manager Control Panel.  It did not work.  I then tried to turn it off - it does not work either.

2 is it possible that when I unplug the HDMI cable from my laptop (like when I want to take my laptop somewhere) that the native computer screen is automatically enabled?  I'd rather NOT have my laptop screen to be active at all when I use my monitor (because they are of different resolutions), but that it has become active when I disconnect the HDMI cable, so if I forgot to transfer the laptop of my external monitor display when I take the laptop with me, I don't have a very expensive brick with an idle screen.

Right-click for a resolution on the first page, select the monitor you want to remove, place "multiple" click on disable display-> press apply-> select "Multiple display" drop down again and now you will be presented with "delete this view"-> apply.

Tags: Windows

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