September Patch Tuesday Updates are out for Windows 10 version 1903 and older, here’s what’s new

Microsoft has just released new Patch Tuesday updates for all supported versions of Windows 10, starting with the May 2019 Update (or version 1903). The latest optional update for this version of Windows had a couple of issues related to Windows Search, and we’re pleased to report that they’re all fixed in the build 18362.356 (KB4515384) that’s shipping today.

This new cumulative update also brings security updates to improve security when browsing the web using Internet Explorer or Microsoft Edge, and more. You can read the full release notes below:

  • 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.
If you’re still running the Windows 10 October Update (or version 1809), the build 17763.737 (KB4512578) is available for you today with similar fixes, except the one for Windows Search issues. You can read more details below:
  • 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.)
  • Security updates to Microsoft Edge, Internet Explorer, Microsoft Scripting Engine, Windows App Platform and Frameworks, Windows Input and Composition, Windows Fundamentals, Windows Authentication, Windows Cryptography, the Microsoft JET Database Engine, Windows Kernel, Windows Virtualization, and Windows Server.

The Windows 10 April 2018 update (or version 1803) is also getting a new patch today with the build 17134.1006 (KB4516058), though keep in mind that this version of Windows 10 will reach end of support for Home and Pro users after November. Microsoft is now in the process of updating these users to the May 2019 Update, as we’ve seen in the latest AdDuplex numbers for the month of August.

Microsoft is also releasing new Patch Tuesday Updates for Windows 10 versions 1709, 1703, and 1607 today, though these patches are only available for Windows 10 Enterprise and Education users. We invite you to check the dedicated release notes on Microsoft’s support website for more information about these updates.

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