Bij het gebruik van een klantendisplay is het verkeerde scherm het hoofdscherm

Press Win + R to launch a Run dialog.

Type regedit and press Enter to launch the Registry Editor. You will be prompted with the User Account Control prompt, where you will have to click Yes.

Next, navigate to the following location by pasting the path in the address bar of the Registry editor:
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers

In the left pane, locate the following keys:
Configuration

Connectivity

ScaleFactors

Delete these registry keys by selecting the Delete option from the right-click context menu.

Restart your Windows 10 PC for the changes to take effect.