KG26 Alpha
I know you're probably only trying to help, but we seem to be having a communications problem. LOL If you read my very first post, you'll find I am having NO problems with the game, with Windows 10 or with OpenGL. All errors have been resolved. I build computers as a hobby and program in several different languages, including Java. I'm what you'd call computer literate.
As for Windows 10, it seems to have issues with OpenGL. Most forums on the issue call it an "error." Call it what you want but after I finished installing Win 10, installed the graphics drivers from Nvidia for my video card and then installed IL-2, IL-2 would not use OpenGL. You could switch to it in video settings, but the rendering was unusable. It appeared to be a series of intersecting planes. DirectX was usable but looked odd.
My system is on the bleeding edge of technology--i7-7700K, Strix z270e mobo, GTX 1080, etc, etc, and yet wouldn't recognize OpenGL. Again, Microsoft calls the issue an "error" with Windows 10.
Downloading DirectX 9 and installing it in a side folder and then installing portions of it into the DirectX 12 installation solved the issue. The game (IL-2) once again was able to use OpenGL. And yes, I'm well aware that OpenGL is the programming interface (API) for graphics cards.
Again, I don't need help. Everything on my end is working perfectly. I merely mentioned it should the person who started the thread (J5_Sturm) run into similar issues, that was the fix I employed to solve them. However, it's probably not the only fix and I would imagine that some people with Win 10 have no issues at all.