Windows 10: Why is it every time I connect a computer to my network using wifi or ethernet it appears...

I own a computer repair shop, and every time I connect a customers computer or new one I am setting up for sale to my network using wifi or Ethernet it appears in my Microsoft account under devices. Then it appears in my account for the Microsoft store also. My customers get home and try setting up email in windows mail my Microsoft email account automatically appears and sets itself up. I do not use my Microsoft account during the setup or repair process I go into devices and remove them and then to the store and do the same. As soon as I connect that computer again there it is again. I need

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How to connect to an existing wifi network?

As you suggested, I tried disabling the ethernet adapter and that caused wi-fi to connect, so the desktop wifi does work. Also, I accessed the router and changed the wireless network name (to wfCHS). Thanks!

However many problems are still unresolved:

My laptop behaves just as I want it to. Assuming the router has wifi turned on and the laptop has an ethernet connection, connection to the internet is by ethernet (no private network name), and the wi-fi connection is to my private network "wfCHS", but with no connection to the internet. (If I disconnect the ethernet cable, then wfCHS becomes connected to the internet and stays that way even if I reconnect the cable.) A directory listing shows both laptop and desktop under "Network". Great!

Things are rather different with the desktop. With Ethernet disabled, the desktop shows a wi-fi connection to the internet. Under Settings > Status it's called "wfCHS" but under Network Connections it's called wfCHS2. If I then re-enable the ethernet connection, the wifi connection stays enabled for a minute or two, then disconnects. Further, the ethernet connection is given the name wfCHS2 under both Status and Network Connections.

Why does the desktop give an (unwanted) name to the ethernet connection while the laptop doesn't?

Why does the desktop disconnect its wi-fi connection a minute or so after the ethernet connection is enabled, while the laptop doesn't?

Why does the desktop give two different names to the wifi connection, depending on whether it's viewed under Status or Network Connections, while the laptop doesn't?

Why does the laptop show the desktop under Network, while the desktop shows only itself?

Things are so convoluted that I'd be happy to start over. I've had the desktop "forget" the wi-fi connection as you suggested, then re-established it, but this hasn't helped. Can the ethernet connection also be "forgotten"?

Really appreciate the help you've given so far!

 

ethernet computer does not show wifi computer in file explorer network list

My desktop computer is connected to my router with ethernet & does not show my WiFi connected laptop computer in the file explorer network list in the left pane. The desktop computer does list itself in the network list. The laptop shows both computers
in its network list. This worked a couple weeks ago before a windows 10 update was done on both computers. I've tried just about everything with no luck. What could be the problem?

 

Connecting Printer to 2 Ethernet computers !

Yes, it should be possible to connect to a printer that is connected to the wireless network while the computer is connected via ethernet.

You just need to be sure that both the wireless network and the wired network are configured to be a part of the same logical network.

You may want to check the user guide for your printer. There should be a way to press a key combination on the printer or go through a menu to print a status page. You want to be sure that the printer is connecting to your network successfully.

Once that is done, you should be able to go to Settings > Devices > Printers & scanners. If your printer does not show up in the list already, you should be able to select "Add a printer or scanner" to add that printer to the list.

EDIT: I should note that this is exactly how my older Brother printer is connected. It is connected using WiFi and my machines that use WiFi as well as those that use Ethernet can access it.