Uh... before, you talked about installing, and now you're talking about "trying to load the game"? So which one is it? Did you manage to install, then?
As for the game itself, I do think my explanation was pretty clear: ever since Windows 10, the SafeDisc DRM the game uses plain and simply isn't supported at all anymore. Compatibility modes won't help you there; the ability of SafeDisc to do its job is simply blocked completely.
As I also said, the only workarounds are to remove the DRM, or to get the digital edition of the game.
I have just tried to reinstall the original Red Alert 2 (Not Yuri's Revenge) on my new Windows 10 64-bit PC. I only get as far as the warning message, but nothing else.
