@Alexandre. Have tried most things but still no success, i.e used Ethernet to connect PC to Deco main unit. Issues encountered - The IP addresses given for the Deco M9 do not load - The firmware...

OK, will try to find a way of hardwire-connecting my PC, as it does not have an ethernet connection.

I am using the second link. The utility upgrade tool that I downloaded is called M9Plus_2.0_upgrade_tool_v1.2.0.win When I open that tool and log in it says Deco M9 Plus Update Asssistant. When I log...

@Alexandre. New problem: When I do Step 3 below the scan starts but then after a few seconds the process disappears from the screen, i.e. I don't get the confirmation/connection to my Deco M9 on the...

There seems to be a problem with the tplinkdeco.net site as it won't load. The same with 192.168.1.1. I have tried both Chrome and Edge, and have the same problem with both browsers and both URLs

@Alexandre. It says 1.2.11 Build 20190926 Rel. 55727 and also Your Deco Home Wi-Fi system is updated