August 13, 2019—KB4512507 (OS Build 15063.1988)

**IMPORTANT:**Windows 10 Enterprise and Windows 10 Education editions will reach end of service on October 8, 2019. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10_._

**Reminder:**March 12 and April 9 were the last two Delta updates for Windows 10, version 1703. 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.

Windows 10, version 1703, reached end of service on October 8, 2018_. Devices running Windows 10 Home, Pro, Pro for Workstation, and IoT Core editions 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._

Windows 10 Mobile, version 1703, reached end of service on June 11, 2019. Devices running Windows 10 Mobile and Windows 10 Mobile Enterprise 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.

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

Highlights

• Updates to improve security when using external devices (such as game controllers and web cameras), Internet Explorer, Microsoft Edge, Bluetooth, networking technologies, and input devices such as a mouse, keyboard, or stylus.

Improvements and fixes

This securityupdate includes quality improvements. Key changes include:

• Addresses an issue that may prevent devices from starting up or cause them to continue restarting if they are connected to a domain that is configured to use MIT Kerberos realms. Domain controllers and domain members are both affected.
• Security updates to Windows Wireless Networking, Windows App Platform and Frameworks, Windows Storage and Filesystems, Microsoft Scripting Engine, Internet Explorer, Windows Input and Composition, Windows Cryptography, Windows Virtualization, Windows Datacenter Networking, Windows Peripherals, the Microsoft JET Database Engine, Windows MSXML, Windows Server, and Microsoft Edge.
  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

• 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.
  After installing this update, applications that were made using Visual Basic 6 (VB6), macros using Visual Basic for Applications (VBA), and scripts or apps using Visual Basic Scripting Edition (VBScript) may stop responding and you may receive an “invalid procedure call error.”| This issue is resolved in KB4512474, which is an optional update. It is available on the following release channels:

• Microsoft Update Catalog.

• Windows Update.

• Microsoft Update.

• Windows Server Update Services (WSUS).
  As with any optional update, you will need to Check for updates to receive and install the update. For instructions, see Update Windows 10.Note Windows Update for Business customers should apply the update using the Microsoft Update Catalog or Windows Server Update Services (WSUS).

How to get this update