Microsoft releases fix for defective January security update

Quick Overview

• Microsoft provides solutions for issues related to the January 2026 security update.
• Problems with authentication and power management impacted Windows users.
• Windows 11 version 23H2 was hit the hardest.
• Manual download options for patches are now available.
• Fixes will be part of February’s Patch Tuesday rollout.

Overview of January Security Update Problems

The January 2026 security update from Microsoft unintentionally caused issues with authentication and power management across multiple Windows versions, most notably affecting Windows 11 version 23H2. While intended to bolster security, this update resulted in unforeseen problems for users.

Effects on Windows Users

The problematic update influenced users running on Windows client versions 10, 11 23H2, 11 24H2, 11 25H2, along with Windows Server 2019, 2022, and 2025. Users faced challenges such as sign-in problems during Remote Desktop sessions and unexpected device reboots instead of shutdowns or hibernation.

Patch Downloads Available Manually

At present, users can manually download and implement the patches, as they haven’t been assimilated into Microsoft’s standard Windows Update process yet. Users are recommended to apply these fixes manually to rectify the issues.

Integration Scheduled for Upcoming Patch Tuesday

Microsoft intends to integrate these fixes into their monthly Patch Tuesday security update session, planned for February 10th at 10am US Pacific Time (5am AEDT). This will provide a smoother update procedure for users worldwide.

Recap

Microsoft’s January 2026 security update led to notable issues for Windows users, especially those utilizing Windows 11 version 23H2. Although manual patches are currently accessible, the forthcoming Patch Tuesday will present a more thorough resolution.

Q: What issues did the January 2026 update create?

A: The update resulted in authentication errors and power management problems, primarily affecting sign-ins and device power-downs.

Q: Which Windows versions were impacted?

A: The versions affected encompass Windows 10, 11 23H2, 11 24H2, 11 25H2, and Windows Server 2019, 2022, and 2025.

Q: How can users address these issues?

A: Users can manually download and implement the patches provided by Microsoft until they are added to the standard Windows Update line-up.

Q: When will the fixes be incorporated into standard updates?

A: Microsoft aims to incorporate the fixes in the upcoming Patch Tuesday updates on February 10th.