WiFi logo appears briefly (Win 11), then disappears and is replaced by globe with no entry sign on

[#1]

Ever since I had PlusNet on May 1st, I've had a problem with my PC.  It connects to PlusNet WiFi, but then the globe icon appears bottom left on Windows 11.  I can browse the internet, but Windows Updates, Spotify and Microsoft Outlook all think it is offline.

I'm tearing my hair out as I think there is some sort of DNS problem occurring here.  Has anyone seen this behaviour before?  I've tried everything, resetting the network adapters, registry entries, stopping/starting services, changing from DHCP to static IP etc.

Can anyone help?  Machine used to be find with Virgin Media beforehand and now will not work with PlusNet.

Also, I'm a bit peeved I cannot have 2.4Ghz and 5Ghz split.  That could be a deal breaker.

[#2]

@theboabmeister   have you looked in the network settings and changed the PN network from public to private?

[#3]

I can check this again, is it against the adapter?

[#4]

No, you can see it in Network and Internet - just type that in the search box.or right click on the wireless symbol at the bottom right bit of the screen.

[#5]

Unfortunately this option isn't there, and I think this is problem, it thinks it's permanently on a private network. It's something to do with the default gateway and NLA service