@Joseph-TP Hi again, thank you for your helpful suggestions. Let me respond to them one by one: "It is recommended that you connect clients that do not need to access each other to the guest network...

@Joseph-TP Hi Joseph, Thank you for checking in. Yes the network topology is as you indicated. I did reset the printer and configure it with the new router network. Also, yes the desktop and printer...

1st up, all my connections are wireless. I have a desktop, printer and WiFi camera 1 metre away from my router with nothing else in between. I also have a smartphone and laptop in the next room, but...