July 9, 2019 - KB4507457 (Security-only update)
Applies to: Windows 8.1, Windows Server 2012 R2
July 19, 2019 - IMPORTANT: Beginning with the July 2019 updates, Active Directory domain controllers will intentionally block unconstrained delegation across forest, external, and quarantined trusts. Authentication requests for services that use unconstrained delegation over the listed trust types will fail when you request new tickets. Administrators should reconfigure the affected services to use resource-based constrained delegation. For more information, see KB4490425.
Improvements and fixes
This security update includes quality improvements. Key changes include:
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.
- Security updates to Windows Wireless Networking, Windows Server, Windows Storage and Filesystems, Microsoft Graphics Component, Windows Input and Composition, Windows Kernel, and Windows App Platform and Frameworks.
Known issues in this update
[ADDED 7/11] KB4512816
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.
Microsoft Update Catalog - To get the standalone package for this update, go to the Microsoft Update Catalog website.
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 4507457.
Source: https://support.microsoft.com/en-us/help/4507457
Direct download links for KB4507457 MSU file from Microsoft Update Catalog:
Download KB4507457 MSU for Windows 8.1 32-bit (x86) - 22.9 MB
Download KB4507457 MSU for Windows 8.1 64-bit (x64) - 41.5 MB
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