I wish you luck. I was hoping that the Microsoft tech would send me the email, telling me what scan program he used that fixed it so that I could let the community know.
All I can tell you is that I upgraded my graphic card per my first contact with Microsoft suggesting I replace my Intel 4400. I purchased from Best Buy a AMD R7 240 and used the Amazon price, and the program still did not work. I called Microsoft again
and after she checked out my computer, she transferred me to another department and during the transfer the system cut me out. Finally on the third call, I got a tech that was able to solve the problem using a scan program that is part of the Windows system.
My suggestion is if you want the Microsoft Flight Simulator X program to work with Windows 10, is to call Microsoft Support (I had used the call back feature, which my calls were returned 5 hours later) and give them my case number which was 1299988518 which
should tell the technician that you contact how they fixed my problem.
PLEASE SEND ME THE FIX I DID A NINSTALL AFTER A WINDOWS 10 UPGRADE