WINDOWS 10 KB4515384

Applies to: Windows 10, version 1903 and Windows Server version 1903. This update brings the OS build to 18362.356.

  • Provides protections against a new subclass of speculative execution side-channel vulnerabilities, known as Microarchitectural Data Sampling, for 32-Bit (x86) versions of Windows (CVE-2019-11091,CVE-2018-12126, CVE-2018-12127, CVE-2018-12130). Use the registry settings as described in the Windows Client and Windows Server articles(These registry settings are enabled by default for Windows Client OS editions and Windows Server OS editions.)
  • Addresses an issue that causes high CPU usage from SearchUI.exe for a small number of users. This issue only occurs on devices that have disabled searching the web using Windows Desktop Search.
  • Security updates to Microsoft Edge, Internet Explorer, Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Input and Composition, Windows Media, Windows Fundamentals, Windows Authentication, Windows Cryptography, Windows Datacenter Networking, Windows Storage and Filesystems, Windows Wireless Networking, the Microsoft JET Database Engine, Windows Kernel, Windows Virtualization, and Windows Server.


Starting around September 5, 2017 some Lenovo laptops that are using the Eye Care mode feature of Lenovo Vantage are noticing a orange tint to screenshots (such as Snipping Tool or Snip & Sketch) . Lenovo has a post on the issue.

Microsoft has received reports that some users are having issues related to the Start menu and Windows Desktop Search.

Reports of the Intel Centrino 6205/6235 are not working but testing the Lenovo X220 and X230 showed no issues. Broadcom 802.11ac cards are also affected. Resetting the WiFi does not survive a reboot.