The guest network should be disabled exactly the way you've done it or a pinhole reset should that fail. Are you still able to connect to the guest network now that it's disabled? If so could you try a full reset by holding the pin in the reset hold for a full 60 seconds before releasing it?
Hi, Thanks - this fixed the issue and it cold started the router. The guest wifi is definitely gone. However, my 200mbps service is now down to @ 45mbps (using speedtest) Typically I would see at least 120mbps (since my router got upgraded to superhub 3) Any ideas?