October 9, 2018—KB4462917 (OS Build 14393.2551)

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Release Date:

Oct 09, 2018

Version:

OS Build 14393.2551

Windows 10, version 1607, reached end of service on April 10, 2018. Devices running Windows 10 Home or Pro editions will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.

IMPORTANT: Windows 10 Enterprise and Windows 10 Education editions will receive six months of additional servicing at no cost. Devices on the Long-Term Servicing Channels (LTSC) will continue to receive updates until October 2026 per the Lifecycle Policy page. Windows 10 Anniversary Update (v. 1607) devices running the Intel “Clovertrail” chipset will continue to receive updates until January 2023 per the Microsoft Community blog.

Windows 10 Mobile, version 1607, reached end of service on October 8, 2018. Devices running Windows 10 Mobile and Windows 10 Mobile Enterprise will no longer receive monthly security and quality updates that contain protection from the latest security threats. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10.

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Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

Security updates to Internet Explorer, Windows Media Player, Microsoft Graphics Component, Microsoft Edge, Windows Kernel, Windows Datacenter Networking, Microsoft Scripting Engine, Microsoft JET Database Engine, and Windows Storage and Filesystems.

Note This update is not available with express installation files for Windows Server 2016.

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

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Windows Update Improvements

Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn't apply to long-term servicing editions.

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Known issues in this update

Symptom	Workaround
After installing this update, installation and client activation of Windows Server 2019 and 1809 LTSC Key Management Service (KMS) (CSVLK) host keys do not work as expected.	This issue is resolved in KB4467684.
After installing this update, Windows Server 2016 promotions that create non-root domains fail in forests in which optional features like Active Directory recycle have been enabled. The error is, “The replication operation encountered a database error”.	This issue is resolved in KB4467684.
After you install the August Preview of Quality Rollup or September 11, 2018 .NET Framework update, instantiation of SqlConnection can throw an exception. For more information about this issue, see the following article in the Microsoft Knowledge Base: 4470809 SqlConnection instantiation exception on .NET 4.6 and later after August-September 2018 .NET Framework updates	This issue is resolved in KB4480977.
After installing this update, users may not be able to use the Seek Bar in Windows Media Player when playing specific files. This issue does not affect normal playback.	This issue is resolved in KB4471321.

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How to get this update

Before installing this update

Windows cumulative updates require that you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). This helps to mitigate potential issues while installing the LCU. For more information, see Servicing stack updates.

If you are using Windows Update, the latest SSU (KB4132216) will be offered to you automatically. To get the stand-alone package for the latest SSU, go to the Microsoft Update Catalog.

Install this update

This update will be downloaded and installed automatically from Windows Update. To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4462917.

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