Old versions updates

Windows 10 update KB4284819 (build 16299.492) releases

Microsoft pushes new updates for older versions of Windows 10 delivering performance improvements, processor vulnerability mitigations, and more.

Windows 10 Update settings

As part of the June 2018 Patch Tuesday rollout, Microsoft is now releasing update KB4284819 for devices still running Windows 10 version 1709 (Fall Creators Update), and it’s also pushing update KB4284874 for computers running Windows 10 version 1703 (Creators Update).

KB4284819 bumps the version number to build 16299.492, and according to the company it fixes a few problems with Microsoft Edge and BitLocker. Also, the update delivers additional performance improvements, mitigates the Speculative Store Bypass processor vulnerability, and patches other security holes.

What’s new with Windows 10 build 16299.492

Microsoft has announced KB4284819 in the Windows support site, and it’s referred as “June 12, 2018—KB4284819 (OS Build 16299.492)”. If you’re already running the Windows 10 version 1709 on your PC, this update will address these problems:

  • Includes additional performance improvements.
  • Provides protections from an additional subclass of speculative execution side channel vulnerability known as Speculative Store Bypass (CVE-2018-3639). 
  • Addresses an issue in Microsoft Edge that causes incorrect responses to XML requests.
  • Adds support for the SameSite cookie web standard to Microsoft Edge and Internet Explorer.
  • Addresses an issue with Internet Explorer that prevents it from using an updated version of location services.
  • Addresses an issue where firmware updates cause devices to go into BitLocker recovery mode when BitLocker is enabled, but Secure Boot is disabled or not present.
  • Security updates to Internet Explorer, Microsoft Edge, Microsoft scripting engine, Windows Desktop Bridge, Windows apps, Windows shell, Windows storage and file systems, Windows app platform and frameworks, Windows virtualization and kernel, Windows wireless networking, and Windows Server.

What’s new with Windows 10 build 15063.1155

On the other hand, KB4284874 bumps the version number to build 15063.1155, and delivers additional performance improvements, fixes problem with boot, and it mitigates processors vulnerabilities, patches security holes, and more.

Microsoft has announced KB4284874 in the Windows support site, and it’s referred as “June 12, 2018—KB4284874 (OS Build 15063.1155)
Applies to: Windows 10 Version 1703”. If you’re already running the Windows 10 version 1703 on your PC, this update will address these problems:

  • Includes additional performance improvements.
  • Addresses an issue where booting with Unified Write Filter (UWF) turned on may lead to stop error 0xE1 in embedded devices, particularly when using a USB hub.
  • Provides support to control usage of Indirect Branch Prediction Barrier (IBPB) on some AMD processors (CPUs) for mitigating CVE-2017-5715, Spectre Variant 2 when switching from user context to kernel context. 
  • Provides protections from an additional subclass of speculative execution side channel vulnerability known as Speculative Store Bypass (CVE-2018-3639).
  • Addresses a mobile-only issue where enterprise files could be saved as personal files even though the Windows Information Protection policy is enabled on the device.
  • Addresses an issue where firmware updates cause devices to go into BitLocker recovery mode when BitLocker is enabled, but Secure Boot is disabled or not present.
  • Increased the Internet Explorer cookie limit from 50 to better align with industry standards.
  • Security updates to Internet Explorer, Microsoft Edge, Microsoft scripting engine, Windows Desktop Bridge, Windows apps, Windows Server, Windows wireless networking, Windows storage and file systems, Windows app platform and frameworks, and Windows virtualization and kernel.

Furthermore, Microsoft also released update KB4284835 for devices on the Windows 10 April 2018 Update to fix a number of issues as well.

How to download June 12 update for Windows 10

These updates for PCs are available immediately, they will 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.