October 15, 2019—KB4519978 (OS Build 17134.1099)

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Release Date:

Oct 15, 2019

Version:

OS Build 17134.1099

The Windows 10 April 2018 Update will reach end of service on November 12, 2019 for Home and Pro editions. We will begin updating devices running the Windows 10 April 2018 Update starting July 16, 2019 to help ensure that these devices remain in a serviced and secure state. For more information, see the Windows 10, version 1903 section of the release information dashboard.

Note Follow @WindowsUpdate to find out when new content is published to the release information dashboard.

Reminder March 12 and April 9 were the last two Delta updates for Windows 10, version 1803. Security and quality updates will continue to be available via the express and full cumulative update packages. For more information on this change please visit our blog.

Starting with update KB4499183, we are introducing functionality that allows you to decide when to install a feature update. You control when you get a feature update while simultaneously keeping your devices up to date. Feature updates that are available for eligible devices will appear in a separate module on the Windows Update page (Settings > Update & Security > Windows Update). If you would like to get an available update right away, select Download and install now. To find out more about this feature, please go to this blog.

When Windows 10 devices are at, or within several months of reaching, end of service, Windows Update will begin to automatically initiate a feature update. This keeps those devices supported and receiving the monthly updates that are critical to device security and ecosystem health.

ePub support ended in Microsoft Edge

Microsoft Edge has ended support for e-books that use the .epub file extension. For more information, see Download an ePub app to keep reading e-books.

For more information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, please see the following article.

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Highlights

Updates an issue that might display a black screen at startup during the first sign in after installing an update.
Updates an issue with Bluetooth when using certain audio profiles for extended periods.
Updates an issue that causes a system to stop working during the Windows upgrade process.
Updates an issue that may prevent a scroll bar from being selected in Internet Explorer.
Updates an issue with the Windows Mixed Reality Portal that might report that your headset is sleeping and it might not wake up.

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Improvements and fixes

This non-security update includes quality improvements. Key changes include:

Addresses an issue that causes a device to repeatedly go into the Windows Out Of Box Experience (OOBE) restart loop in certain situations.
Updates time zone information for Norfolk Island, Australia.
Updates time zone information for the Fiji Islands.
Addresses an issue that may prevent a scroll bar from being selected when an ActiveX control implements the CScrollView class. This occurs if you move the Internet Explorer window, which then moves the scroll bar to the left.
Addresses an issue with MSCTF.dll that causes an application to stop working.
Improves an access control list (ACL) check for Known Folders to prevent a black screen that appears the first time a user signs in after installing a feature or quality update.
Addresses an issue with Bluetooth when using certain audio profiles for extended periods.
Addresses an issue that fails to include the full file hash as part of the Event Log entry during auditing events for Windows Defender Application Control (WDAC).
Addresses an issue in which Microsoft AppLocker may prevent an application from running or log a false positive error instead of running the application.
Addresses an issue that causes a system to stop working during the Windows upgrade process. The Stop error “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e)” appears in the Transmission Control Protocol/Internet Protocol (TCPIP).
Addresses an issue that causes the WDAC policy to become too restrictive when you enable the WDAC Group Policy setting for Script Enforcement or Constrained Language Mode.
Addresses an issue that prevents netdom.exe from displaying the new ticket-granting ticket (TGT) delegation bit for the display or query mode.
Addresses an issue that may cause high CPU usage when many windows are open and Background Application Manager runs a periodic background scan. Additionally, the desktop may become unresponsive. To turn off this scan, set the following registry key:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\BamThrottling

Name: DisableWindowHinting

Type: REG_DWORD

Value: 1

Addresses an issue that causes printing from 32-bit applications to fail with an “Access is denied” error when you select Run as different user for the application.
Addresses an issue that sometimes causes the Resilient File System (ReFS) to stop working.
Addresses an issue with evaluating the compatibility status of the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.
Addresses an issue with a race condition between the volume mount process (within fileinfo.sys) and the deregistration of filter notifications that causes the operating system to stop working on certain virtual machines. The error code is “0x7E.”
Addresses an issue with the Windows Mixed Reality Portal that might intermittently generate a “15-5” error. In some cases, Windows Mixed Reality Portal might report that the headset is sleeping and selecting the Wake up button might appear to produce no response.
Facilitates the configuration of devices that are managed by mobile device management (MDM) settings, which are created by ADMX ingestion. You can update a previously ingested ADMX file with a newer version, and you are not required to delete the previous ADMX file. This solution applies to all applications that use ADMX ingestion.

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

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Known issues in this update

Symptom

Workaround

Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege.

Do one of the following:

Perform the operation from a process that has administrator privilege.
Perform the operation from a node that doesn’t have CSV ownership.

Microsoft is working on a resolution and will provide an update in an upcoming release.

When setting up a new Windows device during the Out of Box Experience (OOBE), you might be unable to create a local user when using Input Method Editor (IME). This issue might affect you if you are using the IME for Chinese, Japanese, or Korean languages.

Note This issue does not affect using a Microsoft Account during OOBE.

This issue is resolved in KB4534308.

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How to get this update

Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU. For more information, see Servicing stack updates.

If you are using Windows Update, the latest SSU (KB4521861) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

Install this update

Release Channel	Available	Next Step
Windows Update or Microsoft Update	Yes	Go to Settings > Update & Security > Windows Update and select Check for updates.
Microsoft Update Catalog	Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	No	You can import this update into WSUS manually. See the Microsoft Update Catalog for instructions.