The optional non-security preview update KB5074105 for Windows 11, versions 25H2 and 24H2, has been formally released by Microsoft. This release, which is part of the "C-week" schedule for January 2026, is more concerned with improving functionality, performance, and dependability than it is with fixing security flaws. As a cumulative update, it integrates previous fixes and introduces new changes to the operating system’s servicing stack and AI-driven components.

Microsoft has included a crucial alert about the impending expiration of Windows Secure Boot certificates, even though this particular package is a non-security update. The majority of Windows devices use certificates that are set to expire in June 2026.

This deadline must be given top priority by administrators and users because failing to update these certificates in time could prevent personal and business devices from booting securely. To avoid operational disruption in enterprise environments, Microsoft strongly advises reviewing the guidelines on Certificate Authority (CA) updates. Beginning with this release, Microsoft has simplified the title format for Windows updates in order to reduce administrative overhead.

The new nomenclature keeps important identifiers like the date prefix, KB number, and build version while eliminating superfluous technical components like platform architecture (such as x64-based systems). The goal of this modification is to make log files and deployment tools like Microsoft Configuration Manager and Windows Server Update Services (WSUS) easier to read.

The underlying models that drive Copilot+ PC experiences and standard Windows 11 AI features have been significantly improved by the KB5074105 update. Due to the phased rollout of these updates, their initial availability may differ before they become generally available. Below is a list of the specific component versions that have been updated in this release.

AI Component Version Identifier Image Search 1.2601.1268.0 Extraction of Content 1.2601.1268.0 Model 1.2601.1268.0 Semantic Analysis 1.2601.1268.0 Settings The Servicing Stack Update (SSU) KB5074104, which raises the servicing stack version to 26100.7704, is included in this cumulative update. Installing Windows updates and maintaining the stability of the update engine itself are the responsibilities of the SSU. Microsoft combines the latest SSU with the Latest Cumulative Update (LCU) to prevent version mismatches during deployment.

As a result, once the SSU part of this package is installed, users cannot remove it. This update is available through Windows Update for Business, the Microsoft Update Catalog, or WSUS for IT administrators who wish to implement it. The combined SSU payload will cause the standard wusa.exe /uninstall switch to fail for users who need to remove the LCU portion of the package for troubleshooting.

Instead, administrators must utilize the Deployment Image Servicing and Management (DISM) tool. The precise LCU package name, which can be obtained by executing DISM /online /get-packages in an elevated command prompt, must be combined with the /Remove-Package option for the particular syntax. For daily cybersecurity updates, check out X, LinkedIn, and Microsoft. As of right now, there are no known problems with this release.

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