Changing network adapter priority in Windows
When both wireless and Ethernet connections are available, Windows automatically gives the Ethernet connection a higher priority. However, when you move your laptop in and out of a docking station, you may find that the wireless connection takes priority even when Ethernet is available. Use the steps below if you find that you need to "force" your computer to use its Ethernet connection. Note that to make these changes you need administrative access to your computer; contact your local IT support if you don't have such access.