A viewer pointed out Heroes VI was not working, and I had the same issue when I tried to start the game up. I contacted Ubisoft and after getting past their standard pc stuff that was not going to help, I got them to send me the settings for the game to work in Win 10 again. Thank you, Ubisoft for your help.
Enjoy!
GPU: GeForce GTX 1070 Ti
CPU: AMD Ryzen 7 1700X Eight-Core Processor
Memory: 16 GB RAM (15.94 GB RAM usable)
Current resolution: 1920 x 1080, 60Hz
Operating system: Win 10 Home version 1909