September 10, 2019—KB4515384 (OS Build 18362.356)

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NoteThis release also contains updates for Microsoft HoloLens (OS Build 18362.1031) released September 10, 2019. Microsoft will release an update directly to the Windows Update Client to improve Windows Update reliability on Microsoft HoloLens that have not updated to this most recent OS Build.

ePub support ending in Microsoft EdgeMicrosoft Edge will end support for e-books that use the .epub file extension over the next several months. For more information, see Download an ePub app to keep reading e-books.

For more information about the various types of Windows updates, such as critical, security, driver, service packs, and so on, please see the following article.

Highlights

• Updates to improve security when using Internet Explorer, Microsoft Edge, networking technologies, and input devices such as a mouse, keyboard, or stylus.
• Updates for verifying user names and passwords.
• Updates for storing and managing files.
• Updates an issue that causes a code 52 error (an exclamation mark inside a yellow triangle) when connecting a Bluetooth audio device.

Improvements and fixes

This security update includes quality improvements. Key changes include:

• Provides protections against a new subclass of speculative execution side-channel vulnerabilities, known as Microarchitectural Data Sampling, for 32-Bit (x86) versions of Windows.
  For more information, see Security Advisory 190013. This advisory includes CVE-2019-11091, CVE-2018-12126, CVE-2018-12127, and 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.
• Addresses an issue that causes a code 52 error (an exclamation mark inside a yellow triangle) when connecting a Bluetooth audio device.
• 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.
  If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Windows Update ImprovementsMicrosoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn’t apply to long-term servicing editions.

Known issues in this update

1. Select the Startbutton and type “services”.
2. Open the Services app and locate Touch Keyboard and Handwriting Panel Service. 3. Double-clickTouch Keyboard and Handwriting Panel Service and selectProperties.
3. Locate Startup type: and change it toManual.
4. Select OK.
   The TabletInputService service is now in the default configuration and IME should work as expected.
   When setting up a new Windows device during the Out of Box Experience (OOBE), you might be unable to create a local user when using Input Method Editor (IME). This issue might affect you if you are using the IME for Chinese, Japanese, or Korean languages.Note This issue does not affect using a Microsoft Account during OOBE.| This issue is resolved in KB4530684.

How to get this update