No Ethernet connection after Windows 11 version 2512 update

peter leitch 10 Reputation points
2025-11-14T08:50:06.07+00:00

Having just upgraded from windows 10 to windows 11 on a new computer on 5th October which connected with ethernet cable to router, I believe that after the Windows 11 version 2512 update that connection stopped working and I have to rely on the wireless connection. Device Manager says 'Realtek PCIe 2.5GbE Family Controller is working properly' - version 10.75.324.2025.

What is the issue and how do I get it to work properly?

Windows for home | Windows 11 | Internet and connectivity
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  1. Sumit D - IA 151.6K Reputation points Independent Advisor
    2025-11-14T09:32:50.1433333+00:00

    Hi Peter,

    Let me troubleshoot this.

    Please supply the following Information.

    Right-click the Start button and Choose the Run option

    Type in msinfo32

    Press enter.

    Take a screenshot of the System Summary window and post it in the next reply.

    I look forward to your response and am eager to collaborate until we find a solution.

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  2. Kapil Arya 36,471 Reputation points Volunteer Moderator
    2025-11-14T17:48:08.51+00:00

    Run Network Adapter troubleshooter from Settings app > System > Troubleshoot > Other troubleshooters. Let us know what it reports back.

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