I have a Lenovo Yoga 900 and want to use it at home with two external screens. I use a docking station (itec USB 3.0 docking station) and connected them; one with hdmi, one with dvi.

Both screens are recognized and when I connect the docking station and close the lid of the notebook, one screen is set as primary desktop and the second screen extends the desktop. So far so good.

As the notebook has a screen resolution of 3200 x 1800 px with 13' I use a scaling of 200%. On the two external screens with the resolution of 1920x1200 I want to use a scaling of 100 %.

Sadly this doesn't work properly. Most stuff on them is scaled with 100 % but some title bars, notification popups and windows are displayed with a scaling of 200 %. Furthermore some texts are very blurry. (Hope it's visible on the screenshot)

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I deactived clear type, but this didn't help.

The drivers for each single part are installed and up to date, as well as Windows 10 itself.
I already googled a lot and it seems as a lot of user have similar problems, but I couldn't find any solution.
The tool for using the windows8 scaling doesn't work either (and wouldn't beuseful, as then every screen would be at 100 % and I have to restart everytime I want to use the laptop screen itself).

If anyone has a idea how I could solve the problems, I really appreciate your help!