KB4512489 Security Only Quality Update for Windows 8.1

August 13, 2019 - KB4512489 (Security-only update)

Applies to: Windows 8.1, Windows Server 2012 R2

Improvements and fixes

This security update includes quality improvements. Key changes include:

Security updates to Windows App Platform and Frameworks, Windows Input and Composition, Windows Wireless Networking, Windows Virtualization, Windows Datacenter Networking, Windows Storage and Filesystems, the Microsoft JET Database Engine, Windows MSXML, and Windows Server.

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

[UPDATED 8/16] - KB4517298 Non-security Update for Windows 8.1 - August 16

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 Rollup. SSUs improve the reliability of the update process to mitigate potential issues while installing the Rollup and applying Microsoft security fixes.

If you are using Windows Update, the latest SSU (KB4504418) 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

Windows Update and Microsoft Update - See the other options below.[/TD]

Microsoft Update Catalog - To get the standalone package for this update, go to the Microsoft Update Catalog.

Windows Server Update Services (WSUS) - This update will automatically synchronize with WSUS if you configure Products and Classifications as follows:
Product: Windows 8.1, Windows Server 2012 R2
Classification: Security Updates

File information

For a list of the files that are provided in this update, download the file information for update 4512489.