Windows 10, version 1909 and Windows Server, version 1909

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Current status as of May 11, 2021:
As of May 11, 2021, the Home and Pro editions of Windows 10, version 1909 and all editions of Windows Server, version 1909 have reached end of servicing. Devices running these editions will no longer receive monthly security and quality updates containing protections from the latest security threats. Education, Enterprise, and IoT Enterprise editions of Windows 10, version 1909 will reach end of servicing May 11, 2022.

As always, we recommend that you update your devices to the latest version of Windows 10 as soon as possible to ensure that you can take advantage of the latest features and advanced protections from the latest security threats. For information about servicing timelines and lifecycle, see the Windows 10 release information and Lifecycle FAQ - Windows.

    Known issues

    This table offers a summary of current active issues and those issues that have been resolved in the last 30 days.

    SummaryOriginating updateStatusLast updated
    Certain IPSEC connections might fail
    Some VPN clients using IPSEC or Layer 2 Tunneling Protocol (L2TP) might have issues connecting.
    OS Build 18363.2037
    KB5009545
    2022-01-11
    Resolved
    KB5010792
    2022-01-17
    14:00 PT

    Issue details

    January 2022

    Certain IPSEC connections might fail

    StatusOriginating updateHistory
    Resolved KB5010792OS Build 18363.2037
    KB5009545
    2022-01-11
    Resolved: 2022-01-17, 14:00 PT
    Opened: 2022-01-13, 11:05 PT
    After installing KB5009545, IP Security (IPSEC) connections which contain a Vendor ID might fail. VPN connections using Layer 2 Tunneling Protocol (L2TP) or IP security Internet Key Exchange (IPSEC IKE) might also be affected.

    Workaround: To mitigate the issue for some VPNs, you can disable Vendor ID within the server-side settings. Note: Not all VPN servers have the option to disable Vendor ID from being used.

    Resolution: This issue was resolved in the out-of-band update KB5010792. It is a cumulative update, so you do not need to apply any previous update before installing it. If you would like to install the update, you will need to Check for updates and select "Optional updates" and then select KB5010792. To get the standalone package for KB5010792, search for it in the Microsoft Update Catalog. You can import this update into Windows Server Update Services (WSUS) manually. See the Microsoft Update Catalog for instructions. Note KB5010792 will not install automatically.

    Affected platforms:
    • Client: Windows 11, version 21H2; Windows 10, version 21H2; Windows 10, version 21H1; Windows 10, version 20H2; Windows 10, version 1909; Windows 10, version 1809; Windows 10 Enterprise LTSC 2019; Windows 10 Enterprise LTSC 2016; Windows 10, version 1607; Windows 10 Enterprise 2015 LTSB
    • Server: Windows Server 2022; Windows Server, version 20H2; Windows Server 2019; Windows Server 2016