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What's new in each Windows 11 cumulative update and feature release: what changed, what to expect, and whether to install it.
24 guides
KB5086672 is an out-of-band update released on March 31, 2026, for Windows 11 version 25H2 and version 24H2. It bumps system builds to OS Build 26200.8117 and OS Build 26100.8117 respectively. As an out-of-band release, it delivers important cumulative fixes outside the regular monthly Patch Tuesday schedule.
Maya Reyes
KB5079489 is an optional non-security preview update for Windows 11 version 26H1 that increments your operating system version to OS Build 28000.1764. Released on March 26, 2026, it offers early access to quality improvements and system refinements ahead of the next mandatory update cycle. Users can install it manually through Windows Update or download the standalone package directly from the Microsoft Update Catalog.
Maya Reyes
KB5127646 is a mandatory cumulative security update for Windows 11, version 26H1, bringing the system to OS Build 28000.3231. Released on October 13, 2026, it includes important security patches and aggregates fixes from earlier updates. You can download it automatically via Windows Update or manually from the Microsoft Update Catalog.
Priya Natarajan
KB5127648 is a mandatory cumulative update released on October 13, 2026, for Windows 11 versions 24H2, 25H2, and 26H2. It updates systems to OS builds 26300.9711, 26200.9711, and 26100.9711 respectively. The release delivers crucial security fixes, servicing maintenance, and system stability enhancements.
Priya Natarajan
Microsoft's mid-October 2026 updates for the Windows Insider Program bring refined channel switching options, manual feature toggles, and new preview capabilities across developer platforms like Visual Studio 2026 and C# 15. Insiders across the Experimental, Beta, and Release Preview channels can now manage unreleased features directly in Settings while testing platform improvements. Staying updated ensures your system receives the latest flighting certificates and underlying system fixes.
Priya Natarajan
KB5126653 is a mandatory cumulative security update released on October 13, 2026, for Windows 11, version 23H2, advancing systems to OS Build 22631.7652. It provides essential security patches, servicing stack improvements, and cumulative fixes following earlier updates like KB5129242. You can install it through Windows Update or manually via the Microsoft Update Catalog.
Maya Reyes
KB5079391 is an optional non-security preview update released on March 26, 2026, for Windows 11 version 24H2 and version 25H2. It updates systems to OS Builds 26200.8116 and 26100.8116, providing quality improvements and system refinements ahead of the next mandatory Patch Tuesday. Users can download it directly from Windows Update or install it manually via the Microsoft Update Catalog.
Priya Natarajan
KB5079466 is a mandatory cumulative security update released on March 10, 2026, for devices running Windows 11, version 26H1. Installing this update increments your system build number to OS Build 28000.1719 and applies monthly security maintenance and quality fixes. You can obtain this update automatically via Windows Update or download it manually from the Microsoft Update Catalog.
Maya Reyes
The latest Windows 11 Insider preview release, Build 26340.9212 for Windows 11 version 26H2, introduces a redesigned File Explorer context menu, automatic Wi-Fi profile sharing in WinRE, and support for Emoji 17.0. It also removes the legacy WMIC tool, updates the Magnifier toolbar, and delivers multiple stability fixes across Settings and input methods.
Priya Natarajan
KB5079473 is a mandatory cumulative security update released on March 10, 2026, for Windows 11 version 24H2 and Windows 11 version 25H2. Installing this update advances your system build number to OS Build 26100.8037 or OS Build 26200.8037. Microsoft reports no known issues for this update.
Priya Natarajan
The latest Windows 11 Insider preview builds for October 2026 deliver major feature updates to the Experimental channel, including Build 26340.9233 and Build 26300.9032. Key updates include per-app privacy controls for desktop apps, a modernized WinUI AutoPlay interface with dark mode support, and a focused Weather lock screen widget view. Insiders also gain an accessibility option to automatically open apps maximized and direct notification previews in the Start menu via Phone Link.
Priya Natarajan
KB5124006 is an optional non-security preview update for Windows 11 version 26H1 that increments the operating system build to 28000.3086. Released on September 22, 2026, this update delivers non-security quality fixes, servicing stack enhancements, and system stability improvements. Because it is an optional preview release, you are not required to install it unless you want early access to these non-security fixes.
Priya Natarajan