October 8, 2019 - KB4519990 (Security-only update)
Applies to: Windows 8.1, Windows Server 2012 R2
Improvements and fixes
This security update includes improvements. Key changes include:
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.
- Security updates to Windows Cryptography, Windows Authentication, Windows Kernel, Windows Storage and Filesystems, Microsoft JET Database Engine, Internet Information Services, the Microsoft Scripting Engine, and Windows Server.
Known issues in this update
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 (KB4521864) 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
File information
For a list of the files that are provided in this update, download the file information for update 4519990.
Source: https://support.microsoft.com/en-us/help/4520005
Direct download links for KB4519990 MSU file from Microsoft Update Catalog:
Download KB4519990 MSU for Windows 8.1 32-bit (x86) - 21.3 MBDownload KB4519990 MSU for Windows 8.1 64-bit (x64) - 32.0 MB
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