Thanks for getting back to me.
It sounds like we’re dealing with a "phantom display’ issue, where the host mistakenly believes that a display is connected when there isn’t one. This results in the problems you describe, where you’re able to drag your mouse over to an unknown monitor, and applications are opening but not visible on any monitors.
When you navigate to your Windows Display settings, do you see this additional “phantom display”? We can check this and workaround around the issue by following these steps:
- Right-click on your Desktop, then choose Display settings
- Under Rearrange your displays, please observe the numbered monitors and see if you can locate the "phantom display’. You can click on the Identify button to help you match up which monitor corresponds to which number
- If you can locate the “phantom display”, click on the monitor, then scroll down to the Multiple displays dropdown field, then select Disconnect this display
Please let me know if this helps, or if you do not see these settings.
Mitchell