Windows 11 January 2026 Update: Consumer Fixes and Key Updates for Enterprises with KB5073379 and KB5073450

The January 2026 Update for Windows 11 is now being rolled out, catering to versions 25H2, 24H2, and 23H2, as well as Windows Server 2025 and 2023. This month’s update brings several important security fixes but lacks significant new features for both consumer and enterprise users.

Summary of January 2026 Patch Tuesday

Here’s an overview of the updates released on January 13, 2026:

The January update addresses 114 security vulnerabilities, including three zero-day vulnerabilities. These critical vulnerabilities can potentially lead to serious risks, such as remote code execution and elevation of privileges.

Notable Security Fixes

The update highlights several specific vulnerabilities that have been addressed:

• CVE-2026-20805: Active information disclosure vulnerability in Desktop Window Manager.
• CVE-2026-21265: Bypass for Secure Boot due to expiring security certificates.
• CVE-2023-31096: Elevation of privilege vulnerability related to modem drivers.

Downloading the Update

To install the updates, users should go to Settings > Windows Update and check for updates. If the updates do not appear, they can visit the Microsoft Update Catalog to find offline installers.

Changes in Windows Server

For Windows Server 2025, the KB5073379 update indicates a shift in KB identifiers, aiming to clarify the differences in updates between consumer and server versions. Microsoft has removed outdated modem drivers and made security improvements to existing components.

New Features

Although no major new features were rolled out with this update, users will gradually begin to notice previously announced features, including:

• A revised Start menu that defaults to a category layout.
• A new Advanced Settings page for enhanced control over certain features, such as File Explorer.
• Dark mode improvements that extend to various dialog boxes within File Explorer.

Windows 10 Update

Windows 10 also received its January update (KB5073724), which requires users to sign up for the Extended Security Updates (ESU). This release shares a similar list of improvements with the server update, including the removal of old modem drivers and the addition of new Secure Boot certificates.

Known Issues

Microsoft has acknowledged a known issue where Remote Desktop connections may fail under specific conditions using Azure Virtual Desktop and Windows 365, and it is working on a solution.

Users are encouraged to keep their systems updated to benefit from the latest security enhancements and features.

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