April 14, 2020—KB4549949 (OS Build 17763.1158)

NEW
IMPORTANTWe have been evaluating the public health situation and understand the impact this is having on many of our customers. To help ease some of the burdens customers are facing, we are going to delay the scheduled end of service date for the Home, Pro, Pro Education, Pro for Workstations, and IoT Core editions of Windows 10, version 1809 to November 10, 2020. This means devices will receive monthly security updates only from May to November. The final security update for these editions of Windows 10, version 1809 will be released on November 10, 2020 instead of May 12, 2020.

NoteThis release also contains updates for Microsoft HoloLens (OS Build 17763.1156) released April 14, 2020. Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.

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.

Highlights

• Updates to improve security when Windows performs basic operations.
• Updates to improve security when using Microsoft Office products.
• Updates for storing and managing files.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• Addresses an issue that prevents certain apps from installing if they are published using a Group Policy Object.
• Security updates to the Microsoft Scripting Engine, Windows Kernel, Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Media, Windows Shell, Windows Management, Windows Cloud Infrastructure, Windows Fundamentals, Windows Virtualization, Windows Core Networking, Windows Storage and Filesystems, Windows Update Stack, 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.

Windows Update ImprovementsMicrosoft 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.

Known issues in this update

1. Uninstall and reinstall any recently added language packs. For instructions, see Manage the input and display language settings in Windows 10.

2. Select Check for Updates and install the April 2019 Cumulative Update. For instructions, see Update Windows 10.Note If reinstalling the language pack does not mitigate the issue, reset your PC as follows:

3. Go to the Settingsapp > Recovery.

4. Select Get Started under theReset this PC recovery option.

5. Select Keep my Files.
   Microsoft is working on a resolution and will provide an update in an upcoming release.

How to get this update