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  • October 10, 2023—KB5031361 (OS Build 17763.4974)


    October 10, 2023—KB5031361 (OS Build 17763.4974)

    Win 10 Ent LTSC 2019 Win 10 IoT Ent LTSC 2019 Windows 10 IoT Core 2019 LTSC Windows Server 2019 Less

    Release Date:



    OS Build 17763.4974

    For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 10, version 1809, see its update history page


    • This update supports daylight saving time (DST) changes in Greenland.

    • This update addresses security issues for your Windows operating system. 


    This security update includes improvements. When you install this KB: 

    • New! This update completes the work to comply with the GB18030-2022 requirements. It removes and remaps characters for Microsoft Wubi input and Microsoft Pinyin U-mode input. You can no longer enter character codepoints that are not supported. All the required codepoints are up to date.

    • New! This update adds Azure Arc Optional Component related links to Server Manager. Now, you can turn on Arc on your servers. You do not need to run a PowerShell script.

    • This update changes the spelling of Ukraine's capital from Kiev to Kyiv.

    • This update addresses an issue that affects scheduled tasks. Tasks that call the credential manager API might fail. This occurs if you select [Run only when user is logged on] and [Run with highest privileges].

    • This update addresses an issue that stops you from getting the IE mode windows list.

    • This update addresses an issue that affects external binding. It fails. This occurs after you install Windows updates dated May 2023 or later. Because of this, there are issues that affect LDAP queries and authentication.

    • This update addresses an issue that affects those who enable the “Smart Card is Required for Interactive Logon” account option. When RC4 is disabled, you cannot authenticate to Remote Desktop Services farms. The error message is, "An authentication error has occurred. The requested encryption type is not supported by the KDC.”

    • This update addresses an issue that affects Kerberos delegation. It might fail in the wrong way. The error code is 0xC000006E (STATUS_ACCOUNT_RESTRICTION). This issue might occur when you mark the intermediate service account as “This account is sensitive and cannot be delegated” in Active Directory. Applications might also return the error message, “System.Security.Authentication.AuthenticationException: Failed to initialize security context. Error code was -2146893042.”

    • This update affects Windows Filtering Platform (WFP) connections. The redirect diagnostics for them has improved.

    • This update addresses an issue that affects a relying party. When you sign out of it, a SAML request cookie is not cleared. Because of this, your device automatically attempts to connect to the same relying party when you sign in again.

    • This update addresses an issue that affects the Server Message Block (SMB) client. It does not reconnect all the persistent handles when the reauthentication of a session fails.

    • To protect against CVE-2023-44487, you should install the latest Windows update. Based on your use case, you can also set the limit of the RST_STREAMS per minute using the new registry key in this update.

      Registry key

      Default value

      Valid value range

      Registry key function




      Sets the allowed number of resets (RST_STREAMS) per minute for a connection. When you reach this limit, the connection ends.

    If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.

    For more information about security vulnerabilities, please refer to the new Security Update Guide website and the October 2023 Security Updates.

    Windows 10 servicing stack update - 17763.4965

    This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. 

    Known issues in this update



    Using the FixedDrivesEncryptionType or SystemDrivesEncryptionType policy settings in the BitLocker configuration service provider (CSP) node in mobile device management (MDM) apps might incorrectly show a 65000 error in the "Require Device Encryption" setting for some devices in your environment. Affected environments are those with the “Enforce drive encryption type on operating system drives” or "Enforce drive encryption on fixed drives" policies set to enabled and selecting either "full encryption" or "used space only". Microsoft Intune is affected by this issue but third-party MDMs might also pe affected.

    Important This issue is a reporting issue only and does not affect drive encryption or the reporting of other issues on the device, including other BitLocker issues.


    To mitigate this issue in Microsoft Intune, you can set the “Enforce drive encryption type on operating system drives” or "Enforce drive encryption on fixed drives" policies to not configured.

    We are working on a resolution and will provide an update in an upcoming release.



    How to get this update

    Before installing this update

    Microsoft now combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions


    You must install the August 10, 2021 SSU (KB5005112) before installing the LCU. 


    Install this update

    Release Channel


    Next Step

    Windows Update and Microsoft Update


    None. This update will be downloaded and installed automatically from Windows Update.

    Windows Update for Business


    None. This update will be downloaded and installed automatically from Windows Update in accordance with configured policies.

    Microsoft Update Catalog


    To get the standalone package for this update, go to the Microsoft Update Catalog website.

    Windows Server Update Services (WSUS)


    This update will automatically sync with WSUS if you configure Products and Classifications as follows:

    Product: Windows 10

    Classification: Security Updates

    If you want to remove the LCU

    To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

    Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

    File information

    For a list of the files that are provided in this update, download the file information for cumulative update 5031361.

    For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 17763.4965

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