PC started to have Router connectivity problems

Fairly old win 10 PC up to date ref cumulative releases exhibits bizarre behaviour depending on which WiFi dongle attached.
a) existing Dual Band USB adaptor stopped connecting to home router (up to date Fritz.Box 7362 SL) shows some neighborhood routers as being available but home doesn't show up. There cannot be a problem with the router as there are many other devices connecting with no problem . This PC has been in happy connection to this router for some years.
I have reinstalled dongle from CD and nothing. Troubleshooting comes up with message that "you haven't tried to connect to a router".
Device Manager shows my router on info page when i tab on available devices but it doesn't show when I look at network connections.

2) Edimax 150Mbps which I from a Pi finds and connects to my home router but loses connection after 2-3 minutes. Troubleshooting finds problem and corrects but connection breaks

What can I do. I have read a thread today from Pablo white which sounds similar but different.

I would prefer to run a tool to correct if one exists. I would like to avoid inputting a series of commands. But will if nothing else

What is recommendation

Thanks

vger said:

Hello

Do you know what was the latest win 10 updates that you did?

@Rustys

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Many thanks for taking an interest. I experimented with different WLAN dongles. Edimax connected but lost contact. I reinstalled, connected disconnected Then at one time I had two different dongles installed and then yesterday the problem dongle finally connected and I still don't know why. It has remained connected with no problems

I will advise if it fails again. Oh

Oh! Meant to add that my PC is up to date with the 04/20 cumulative update

phillpower2 said:

Are things still going ok with the wireless connection Josl47?

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I have just seen your enquiry. I really appreciate you following this up. I will reply tomorrow because although I can connect, there is a weird problem which doesn't make sense. More tomorrow