Experiencing problems with connecting via Ethernet


  1. Posts : 2
    Windows 10
       #1

    I am Experiencing problems with connecting via Ethernet


    My computer has experienced a problem where when I plug in the Ethernet cable and connect to the network, it fails to connect to the internet says it is an "Undefined Network" and can't connect to the Internet. When I run a diagnosis it finds that Ethernet doesn't have a valid IP configuration.

    Windows specs

    Edition Windows 10 Pro
    Version 20H2
    Installed on ‎4/‎09/‎2020
    OS build 19042.746
    Experience Windows Feature Experience Pack 120.2212.551.0

    I am using a Realtek PCIe GbE Family Controller

    If you need any information Just ask
    Last edited by Kyle W120; 14 Jan 2021 at 23:56.
      My Computer

  2. Matthew Wai's Avatar
    Posts : 5,788
    Windows 10 Home 20H2
       #2

    Could you connect to the Internet via Ethernet previously?
      My Computer


  3. Posts : 1
    Windows 10 Home
       #3

    Hi Kylie,

    I just finished a Build for a Client with an Asrock H410m-HVS motherboard with Realtek PCIe GbE Family Controller LAN.
    Exact same issue. "Unidentified Network", Ethernet doesn't have a valid IP configuration (after troubleshooting).
    There is a noted workaround in Control Panel - Power Options - Choose what the Power Button Do - Change Settings that are Currently Unavailable - Uncheck the "Turn on Fast Start Up" Option - Then Restart.

    I have had no luck with this work around but some people have.

    I have a Personal Computer/Laptop and Workshop System with Intel LAN Family and they are working fine with the Windows 20H2 Update.
    Installing a wireless adapter solves the Issue on my Clients Build, although not a great solution, but it works for now.

    I will need to reinstall Windows 10 and check the LAN adapter to see if it is working before the 20H2 update is installed.
    I did not realise the Adapter was not working, until I took to the Customer and plugged into Ethernet, as this Build was completed entirely over a Wireless Network.
      My Computer

  4. vipergg's Avatar
    Posts : 34
    Windows 10 version 20H2
       #4

    It is possible your router is starting to crap out . For some reason it may not be handing out an ip address . Did you try rebooting the router ? Does the router see your nic mac address ?
      My Computer

  5. Matthew Wai's Avatar
    Posts : 5,788
    Windows 10 Home 20H2
       #5

    Right-click on the Start button --> Windows PowerShell. Run the following command and post the output.

    Ipconfig /all
      My Computer


  6. Posts : 2
    Windows 10
    Thread Starter
       #6

    Matthew Wai said:
    Could you connect to the Internet via Ethernet previously?
    Yes I could previously connect via ethernet then It randomly stopped working overnight also running the ipconfig /all command didn't work
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 01:59.
Find Us




Windows 10 Forums