Hi all. Not a desperate issue as I obviously have a connection! My setup is a Windows 10 desktop and a NowTV (Sky) router plus some ethernet over power adapters and a WiFi extender.

The main router (Router_Main) is connected to the extender (Router_Upstairs) via ethernet over power. My desktop uses both WiFi and ethernet over power. However, some time ago but I don't know when, the desktop stopped seeing Router_Main over WiFi. It can see it over wired ethernet and it can see Router_Upstairs over WiFi. All my other devices can see Router_Main so the issue is just with my Windows 10 desktop.

I wondered if having both a wired and wireless connection was causing an issue so I disconnected the wired one but that did not improve anything.

I am no networking expert but pretty computer savvy. Can anyone help?