Improvements and fixes
This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:
- Addresses an issue that causes high CPU usage that results in performance degradation on some systems with Family 15h and 16h AMD processors. This issue occurs after installing the July 2018 Windows updates from Microsoft and the AMD microcode updates that address Spectre Variant 2 (CVE-2017-5715 – Branch Target Injection).
- Security updates to Windows App Platform and Frameworks, Windows Graphics, Internet Explorer, Windows Wireless Networking, Windows Kernel, and Windows Server.
For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.
Known issues in this update
|After installing this update, users may not be able to use the Seek Bar in Windows Media Player when playing specific files. This issue does not affect normal playback.||This issue is resolved in KB4471322.|