Applies ToWindows 10, version 1803, all editions

Release Date:

4/9/2019

Version:

OS Build 17134.706

Reminder: March 12th and April 9th will be 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.

Improvements and fixes

This update includes quality improvements. Key changes include:

  • Provides protections against Spectre Variant 2 (CVE-2017-5715) and Meltdown (CVE-2017-5754) for VIA-based computers. These protections are enabled by default for the Windows Client, but disabled by default for Windows Server. For Windows Client (IT Pro) guidance, follow the instructions in KB4073119. For Windows Server guidance, follow the instructions in KB4072698. Use these guidance documents to enable or disable these mitigations for VIA-based computers.

  • Addresses a stop error that occurs when attempting to start the Secure Shell (SSH) client program from Windows Subsystem for Linux (WSL) with agent forwarding enabled using a command line switch (ssh –A) or a configuration setting.

  • Addresses an issue that may cause applications that use MSXML6 to stop responding if an exception was thrown during node operations.

  • Addresses an issue that causes the Group Policy editor to stop responding when editing a Group Policy Object (GPO) that contains Group Policy Preferences (GPP) for Internet Explorer 10 Internet settings.

  • Addresses an issue that occurs when you enable per font end-user-defined characters (EUDC). The system will stop working and a blue screen will appear at startup. This is not a common setting in non-Asian regions.

  • Addresses an issue that may cause compound document (OLE) server applications to display embedded objects incorrectly if you use the PatBlt API to place embedded objects into the Windows Metafile (WMF).

  • Security updates to Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Storage and Filesystems, Windows Server, Windows Graphics, Windows Input and Composition, Windows Kernel, Windows Virtualization, Windows MSXML, and the Microsoft JET Database Engine.

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.

Known issues in this update

Symptom

Workaround

After installing this update, Custom URI Schemes for Application Protocol handlers may not start the corresponding application for local intranet and trusted sites on Internet Explorer.

This issue is resolved in KB4493437.

After installing this update, there may be issues using the Preboot Execution Environment (PXE) to start a device from a Windows Deployment Services (WDS) server configured to use Variable Window Extension. This may cause the connection to the WDS server to terminate prematurely while downloading the image. This issue does not affect clients or devices that are not using Variable Window Extension.

This issue is resolved in KB4503286.

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.

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 and applying Microsoft security fixes. For more information, see Servicing stack updates.

If you are using Windows Update, the latest SSU (KB4485449) will be offered to you automatically. To get the standalone 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 standalone 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 4493464.

Related info

Thank you for visiting the Windows 10, version 1803 update history page today. If you would like to learn more about how to use these pages and make the most of them, see our blog post.

To improve the information presented in the history pages and related KBs and make them more useful to our customers, we have created an anonymous survey for you to share your comments and feedback. 

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