May 19, 2019—KB4505064 (OS Build 17134.766)

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Release Date:

May 19, 2019

Version:

OS Build 17134.766

Reminder: March 12^th and April 9^th 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.

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Improvements and fixes

This update includes quality improvements. Key changes include:

Addresses an issue that may prevent access to some gov.uk websites that don’t support HTTP Strict Transport Security (HSTS) when using Internet Explorer 11 or Microsoft Edge.

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

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.

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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 (KB4497398) 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

UK customers : This update will be applied automatically to resolve this issue. You may be required to restart your device again. If you are affected by this issue, Check for updates to apply the update immediately.
Customers outside of the UK: This update will not be applied automatically. If you are affected by this issue, we recommend that you apply this update from Windows Update and then restart your device.

To download and install this update, go to Settings > Update & Security > Windows Update and select Check for updates.

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 4505064.

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