Windows 10 and Heroes 3 – anyone know how to make it work? Help!

A subscriber had DirectPlay issues that were resolved in a similar way:
https://www.youtube.com/watch?v=WrufOcVR_HU

The problem isn't with the operating system, but with the fact that it's an old service that is disabled by default. However, in some builds, it is enabled. Another option is to run it as an administrator and in compatibility mode with Windows XP, but in Windows 10, this function is, to put it mildly, not well-implemented (not stable).