Windows Update

Winsage
October 4, 2026
In October 2026, Microsoft is addressing ongoing issues from its September updates for Windows 11, particularly related to audio decoding. Certain applications and games using Windows' built-in AC-3 (Dolby Digital) audio decoding may crash when users adjust volume or audio settings. This issue primarily affects older applications and games, while most modern apps are expected to function normally. Microsoft has issued multiple updates, including a mandatory Patch Tuesday update and an emergency patch, but some audio problems remain unresolved. The September updates also introduced a significant increase in security fixes, addressing 974 vulnerabilities compared to 86 in September 2025. Additionally, an emergency update disrupted the functionality of File History, which Microsoft is investigating. An optional update aimed to fix File History but led to new crashes in various applications. Microsoft is currently working on a resolution for the audio-decoding bug without a specified timeline.
Winsage
October 4, 2026
On September 22, 2026, Microsoft released the optional Preview Update KB5124010 for Windows 11 versions 24H2, 25H2, and 26H2, aimed at enhancing performance and addressing various issues, with broader distribution planned for October 2026. User feedback indicated concerns about complications from the update. A user reported that applications were crashing due to issues with the library file msmpeg2ac3dec.dll when multiple MP3 files were played simultaneously, affecting older games like SimCity 4 and Fallout New Vegas. The user's company’s telephone system, using innovaphone, also experienced crashes with the myApps client. The msmpeg2ac3dec.dll file was found only on systems upgraded from Windows 11 22H2, while fresh installations of 24H2 or 25H2 did not include it. A workaround involving the installation of "LAV Filters" was tested and found to resolve the crashing issue. Microsoft acknowledged the issues related to the Preview Update KB5124010, stating that applications requiring AC-3 audio decoding might close unexpectedly and that they are working on a resolution for this problem in a future update.
Winsage
October 1, 2026
Microsoft has unveiled Windows 11 26H2, an "enablement package" designed for quicker installation. There is no direct upgrade from Windows 11 26H1, which was only for Snapdragon X2 Arm devices, but users with versions 25H2 or 24H2 can upgrade easily. The rollout is gradual, and users can check eligibility via Settings > Windows Update. The update can also be accessed through Microsoft's Download Windows 11 website. Version 26H2 compiles feature and security updates from the past year, including enhancements like a customizable Start menu, improved Windows Search, and better support for fingerprint readers. Support for version 23H2 has ended, 24H2 will end on October 13, 2026, and 25H2 will end on October 12, 2027. Version 26H2 will receive support until October 10, 2028.
Winsage
October 1, 2026
Microsoft has rolled out the Windows 11 2026 Update (version 26H2) for eligible devices running Windows 11 versions 24H2 or 25H2. The update is being implemented as a controlled feature rollout and is delivered as an enablement package, activating features already integrated into the system. Versions 24H2, 25H2, and 26H2 share a unified servicing branch and codebase, making the installation process similar to a standard monthly cumulative update. Windows 11 26H2 consolidates various improvements, security enhancements, and fixes from version 25H2, with some features previously disabled in 25H2 now enabled by default. Installing 26H2 resets the support clock, providing 24 months of support for Home and Pro editions and 36 months for Enterprise and Education editions. Users can manually request the update through Windows Update settings. Organizations can deploy version 26H2 using Windows Autopatch and other management tools, with a recommendation for targeted deployment initially. Devices that shipped with Windows 11 version 26H1 cannot upgrade to 26H2 due to differences in the Windows core. Microsoft may also implement safeguard holds on devices with known compatibility issues, delaying the update until resolved.
Winsage
September 30, 2026
Microsoft has unveiled the Windows 11 2026 Update, version 26H2, on September 29, 2023, accessible for eligible devices running Windows 11 versions 24H2 or 25H2. The update is a controlled feature rollout and is delivered as an enablement package, activating features already embedded in the system. It consolidates improvements, security patches, and enhancements from the past year, with some features previously disabled in 25H2 now enabled by default in 26H2. Installing 26H2 resets the support lifecycle, providing 24 months of support for Home and Pro editions and 36 months for Enterprise and Education editions. Users can manually request the update through Windows Update settings. Organizations can deploy 26H2 via Windows Autopatch and other management tools, with targeted deployments recommended first. Devices that shipped with Windows 11 version 26H1 cannot upgrade to 26H2 and will receive a future upgrade path instead. Microsoft may also implement safeguard holds on devices with known compatibility issues.
Winsage
September 30, 2026
Windows 11, version 26H2 is now available for eligible devices running Windows 11, versions 25H2 and 24H2. The update is delivered via a small enablement package that activates new features already integrated into the operating system. The installation process is similar to a monthly update, requiring a minor download and a quick restart. The update includes enhancements in quality, reliability, and security. For commercial and educational customers, it can be accessed through existing management tools like Windows Autopatch and the Microsoft 365 admin center. Version 26H2 offers 24 months of support for Home and Pro editions and 36 months for Enterprise and Education editions. Some features that were disabled in version 25H2 will now be enabled by default in version 26H2.
Winsage
September 28, 2026
Microsoft's Windows 10 update "KB5126256," intended as a licensing preparation package for Extended Security Updates, has caused issues for users, including one Reddit user whose File Explorer crashes when clicking on files due to the automatic activation of the Copilot feature. The crashes were misleadingly attributed to Microsoft Edge, but further investigation revealed they were linked to "mscopilot_proxy.exe" and the module "ShellEh6055x64.dll," associated with the 4t Tray Minimizer application. Users have reported that uninstalling problematic updates can provide temporary relief, while some have chosen to disable updates entirely, despite Windows not offering a complete option to do so.
Winsage
September 28, 2026
Windows 11 26H2 is expected to begin public rollout around the week of September 28 or early October. Microsoft has released evaluation ISOs for enterprise users to assess compatibility before broader deployment. The release of these ISOs indicates that the public rollout is imminent. Windows 11 26H2 is built on the same platform as versions 24H2 and 25H2, which allows for a smoother upgrade experience. Support for Windows 11 25H2 ends on October 12, 2027, and for 24H2 even sooner, prompting the introduction of 26H2 to provide users with a new support window. Windows 11 26H2 will be available as an optional feature update and will take about five minutes to install for users with up-to-date systems running 24H2 or 25H2. Eligibility for the update includes any PC currently running Windows 11 24H2 or 25H2. The rollout is expected to occur on a Tuesday, with potential dates of September 29 or October 6. Not all eligible PCs will receive the update simultaneously, and users can manually check for updates or download ISOs as needed.
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