You still need to run it in compatibility mode, but it will work with no problems. so that I now have c:\Microsoft games\cfs 3 etc. The fix: copy the whole cfs3 directories to the root directory. You also can see how other CFS3 gamers have fixed problems by using one or more websites for CFS3 gamers.
You can select the previous Windows OS, such as Windows XP, Service Pack 2 or 3. You have to run the 'Program Compatibility Troubleshooter'. Since Win 10 is so new, and so little flight sims are being made, I don't know of any that are now compatible without tweaks or are being made with Win10 in mind. Many times you have to do a lot of different tweaks to get them to work.
My advice would be to check out the various original games websites, their game forums for MCS3, IL-2 Sturmovik, and other sims. A number of combat flight sims will work on Windows 10 using 'compatibility mode', including MCS3.
