@David-TP Unfortunately I haven't tried it yet. I haven't had the time and also concerned the entire thing might not comeback properly. Can't afford any downtime at the moment. So I've been using the...

@Thermo Have a very similar problem with mine here. Curious if you find a solution beyond resetting the entire system

@Sunshine I cannot save the settings on the original network - the guest network can be made and unmade but it is of course still part of the orginal network. Password and login havne't been changed...

MY Deco network has performed fine ( 3x M4R extenders hanging of my cable modem throughout the house) until last night it just disappeared. Network doesn't show up in the Wifi list for any devices....