@dale Did you try to install a new Rhino 5 C/C++ SDK on the latest Windows 10? I think that others, e.g., @foreigner could also confirm that Rhino 5 C/C++ SDK installation does not work on Windows 10. It seems that Rhino 5 SDK installation tries to change Windows 10 register with an error (We run the installation as administrator). The following is the error message.
