Slew of fixes

Windows 10 update KB4343909 (build 17134.228) releases

Microsoft pushes Patch Tuesday updates for Windows 10 — Here's everything you need to know.

Windows 10 update KB4343909

Right on schedule, Windows 10 is getting its Patch Tuesday update for August 2018. In this rollout, Microsoft is pushing update KB4343909 for the April 2018 Update (version 1803) addressing a slew of issues with the latest public release of Windows 10.

KB4343909 bumps the version number to build 17134.228, and according to the software maker, the update mitigates the L1 Terminal Fault (L1TF) vulnerability found in some Intel processors, and it addresses high CPU usage in some AMD processors.

Also, the update improves battery life after upgrading to Windows 10 version 1803, and fixes several problems with Microsoft Edge, Internet Explorer, HoloLens, and Device Guard.

Windows 10 build 17134.228

Microsofthas announced KB4343909 in the Windows support site, and it’s referred as “August 14, 2018—KB4343909 (OS Build 17134.228)”. If you’re already running the Windows 10 version 1803 on your PC, this update will address these problems:

  • Addresses an issue that significantly reduced battery life after upgrading to Windows 10, version 1803.
  • Fixes a problem that prevents apps from receiving mesh updates after resuming.
  • Ensures that Internet Explorer and Microsoft Edge support the preload=”none” tag.
  • Addresses an issue that prevents some applications running on HoloLens, such as Remote Assistance, from authenticating after upgrading from Windows 10, version 1607, to Windows 10, version 1803.
  • Fixes a problem that causes Device Guard to block some ieframe.dll class IDs after installing the May 2018 Cumulative Update.
  • Addresses a vulnerability related to the Export-Modulemember() function when used with a wildcard (*) and a dot-sourcing script.
  • Mitigates a new speculative execution side-channel vulnerability known as L1 Terminal Fault (L1TF) that affects Intel Core processors and Xeon processors (CVE-2018-3620 and CVE-2018-3646). Make sure previous OS protections against Spectre Variant 2 and Meltdown vulnerabilities are enabled using the registry settings outlined in the Windows Client and Windows Server guidance KB articles.
  • Fixes a problem that causes high CPU usage that results in performance degradation on some systems with Family 15h and 16h AMD processors. 

Windows 10 build 16299.611

The Fall Creators Update is getting update KB4343897, and the Windows support site referred it as “August 14, 2018—KB4343897 (OS Build 16299.611)”. If you’re already running the Windows 10 version 1709 on your PC, this update will address these problems:

  • Updates support for the draft version of the Token Binding protocol v0.16.
  • Addresses an issue that causes Device Guard to block some ieframe.dll class IDs after the May 2018 Cumulative Update is installed.
  • Ensures that Internet Explorer and Microsoft Edge support the preload=”none” tag.
  • Addresses an issue that displays “AzureAD” as the default domain on the sign-in screen after installing the July 24, 2018 update on a Hybrid Azure AD-joined machine.
  • Fixes a problem that adds additional spaces to content that’s copied from Internet Explorer to other apps.
  • Addresses an issue that was introduced in the July 2018 .NET Framework update. Applications that rely on COM components were failing to load or run correctly because of “access denied,” “class not registered,” or “internal failure occurred for unknown reasons” errors.
  • Addresses a vulnerability related to the Export-Modulemember() function when used with a wildcard (*) and a dot-sourcing script.
  • Mitigates a new speculative execution side-channel vulnerability known as L1 Terminal Fault (L1TF) that affects Intel Core processors and Xeon processors (CVE-2018-3620 and CVE-2018-3646). Make sure previous OS protections against Spectre Variant 2 and Meltdown vulnerabilities are enabled using the registry settings outlined in the Windows Client and Windows Server guidance KB articles.
  • Fixes a problem that causes high CPU usage that results in performance degradation on some systems with Family 15h and 16h AMD processors. 

You can manually download the latest update for Windows 10 version 1709 from the Microsoft Update Catalog website.

Windows 10 build 15063.1266

The Creators Update is getting update KB4343885, and the Windows support site referred it as “August 14, 2018—KB4343885 (OS Build 15063.1266)”. If you’re already running the Windows 10 version 1703 on your PC, this update will address these problems:

  • Addresses an issue that causes Internet Explorer to stop working for certain websites.
  • Updates support for the draft version of the Token Binding protocol v0.16.
  • Addresses an issue that causes Device Guard to block some ieframe.dll class IDs after installing the May 2018 Cumulative Update.
  • Ensures that Internet Explorer and Microsoft Edge support the preload=”none” tag.
  • Addresses a vulnerability related to the Export-Modulemember() function when used with a wildcard (*) and a dot-sourcing script.
  • Addresses an issue that was introduced in the July 2018 .NET Framework update. Applications that rely on COM components were failing to load or run correctly because of “access denied,” “class not registered,” or “internal failure occurred for unknown reasons” errors.

You can manually download the latest update for Windows 10 version 1703 from the Microsoft Update Catalog website.

Older versions of Windows 10

Although the Anniversary Update is no longer supported, organizations with Windows 10 Enterprise or Education are getting update KB4343887. In addition, the initial release of Windows 10 is receiving update KB4343892.

Download August 14 update for Windows 10

These updates are available immediately, they’ll download and install automatically, but you can always force the update from Settings > Update & Security > Windows Update and clicking the Check for updates button. You can find more details about the most recent updates in the Windows 10 update history tracker guide.