Reminder March 12 and April 9 were the last two Delta updates for Windows 10, version 1709. 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.
Reminder Windows 10, version 1709, reached end of service on April 9, 2019 for devices running Windows 10 Home, Pro, Pro for Workstation, and IoT Core editions. These devices 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, Education, and IoT Enterprise editions will continue to receive servicing at no cost per the lifecycle announcement on October 2018.
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.
- Updates to improve security when Windows performs basic operations.
- Updates to improve security when using external devices (such as game controllers and web cameras).
- Updates an issue in which the Microsoft Store might fail to open on Windows on Arm.
Improvements and fixes
This security update includes quality improvements. Key changes include:
- Addresses an issue in which the Microsoft Store might fail to open on Windows on Arm.
- Changes the default behavior in ASP.NET for the SameSite cookie header to align with changes other industry partners are making. For more information, see Work with SameSite cookies in ASP.NET.
- Security updates to Windows Virtualization, Windows Kernel, Windows Peripherals, the Microsoft Scripting Engine, and Windows Server.
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
|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:
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 KB4534318.
|After installing this update, you might encounter issues with applications that use embedded HTML and SameSite cookies across sites or iframes.||To align with industry partners, the default behavior of the SameSite cookie header in ASP.NET has been changed. To mitigate this issue, see Work with SameSite cookies in ASP.NET.|
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.
Install this update
|Release Channel||Available||Next Step|
|Windows Update and Microsoft Update||Yes||None. This update will be downloaded and installed automatically from Windows Update.|
|Microsoft Update Catalog||Yes||To get the standalone package for this update, go to the Microsoft Update Catalog website.|
|Windows Server Update Services (WSUS)||Yes|| |
This update will automatically synchronize with WSUS if you configure Products and Classifications as follows:
Product: Windows 10Classification: Security Updates
For a list of the files that are provided in this update, download the file information for cumulative update 4530714.