Hi Alan,
Thank you for posting your query in Microsoft Community. I understand the issue that you are facing currently, and we in Community will try to resolve your issue the best way we can.
I would suggest you to install the MS Flight Simulator in a compatibility mode and check if it helps. Compatibility mode runs the program using settings from a previous version of Windows.
Follow these steps to install the game in compatibility mode and check if that helps.
a. Download the game from the website.
b. Right-click on the setup file and click on ‘properties’.
c. Click on the ‘compatibility’ tab and check the box ‘Run this program in compatibility mode for’ and select Windows 8/8.1 operating system from the drop down menu and proceed with the installation.
d. Once this is done, restart the computer and check if the issue persists.
Kindly let us know if you need any further assistance with Windows. We are glad to assist you.
Thank you.