N editions should exclude just certain media features. I remember it trying in Win 7 days and never touched it again, never saw a point. Some additional info. Important bit is to not use Home edition, use Pro, Education or Enterprise instead.

As for Copilot, is there anything under these registry keys?

• HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\WindowsCopilot
• HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsCopilot