The default network setting on a Windows computer is to disconnect Wi-Fi and switch to Ethernet connection, whenever an Ethernet cable is plugged-in to the computer.
However, this does not really mean that the Wi-Fi Network is completely disconnected from the computer. The Wi-Fi network simply gets switched off, while remaining ready and available for selection.
This default setting ensures that network traffic is not accidentally sent to Wi-Fi instead of Ethernet. It also provides security, by ensuring that access to your computer is limited to the active network.
Note: If you are using an Office network, being connected to both Wi-Fi and Ethernet at the same time can be flagged as unsafe practice.
1. Prevent Wi-Fi from Turning OFF When Ethernet is Plugged-in
You can follow the steps below to prevent your computer from disconnecting Wi-Fi, whenever it is connected.
1. Go to Settings > Network & Internet > scroll down in the right-pane and click on Advanced Network Settings.
2. On the next screen, scroll down and click on More Network Adapter Options.
Windows 10: Go to Settings > Network & Internet > scroll down in the right-pane and click on Change Adapter options.
3. On Network Connections screen, right-click on Ethernet and click on Properties.
4. On Ethernet Properties screen, click on the Configure button located below the Wireless Adapter.
5. On the next screen, switch to Advanced tab, select Priority & VLAN entry and set its value to Disabled in the Value Field.
6. Click on OK to save this setting on your computer.
From now on, whenever you connect an Ethernet cable to Computer, the Wi-Fi should not be disconnected.