Key Takeaways
1. Users are dissatisfied with the January 13, 2026, cumulative update (KB5074109) for Windows 11, reporting system instability and issues after installation.
2. Complaints include black screens and display problems, especially for users with NVIDIA graphics hardware, leading some to revert to Safe Mode for uninstallation.
3. Applications, including Windows tools and Outlook, are failing to open or displaying error codes, with specific issues noted for Outlook users with PST files in OneDrive.
4. Microsoft released urgent out-of-band updates to address some issues, but reports of black screens and app-launch failures persist for Windows 11 versions 24H2 and 25H2.
5. Experts recommend uninstalling the update if experiencing instability, while cautioning that reverting may increase security risks; users should stabilize their systems first before reapplying fixes.
Microsoft’s January 13, 2026, cumulative update for Windows 11 has been met with increasing dissatisfaction from users. They claim their systems became unstable right after they installed it. The update, known as KB5074109, upgrades Windows 11 25H2 and 24H2 to OS builds 26200.7623 and 26100.7623 and incorporates security enhancements and reliability fixes, notably a power fix for devices equipped with a Neural Processing Unit (NPU).
Uninstalling the Update
As more complaints surfaced, Microsoft’s support guidance and public troubleshooting discussions began to suggest that uninstalling the update was an acceptable solution for those affected. Various Windows communities have reported multiple recurring issues linked to the January update, with some problems seemingly specific to certain setups.
Several users have encountered unexpected black screens or display issues following the update installation, particularly among those using NVIDIA graphics hardware. In some serious instances, users were forced to revert to Safe Mode or the Windows recovery environment to uninstall the update and regain normal startup functionality.
Application Issues
Reports also indicated that applications would not open and displayed error codes like 0x803F8001. This included Windows applications such as Notepad and Snipping Tool, as well as third-party programs and software from vendors. Microsoft has recognized problems impacting “classic” Outlook since the January 13 updates. The company noted that users with POP account profiles, especially those with PST files that are stored in OneDrive, may experience Outlook freezing and failing to close properly, which can hinder the app from reopening correctly.
For affected Outlook users, Microsoft has shared workarounds, including relocating PST files from OneDrive or utilizing different access methods until a permanent solution is provided.
Emergency Updates
Following Patch Tuesday, Microsoft released urgent out-of-band updates addressing specific regressions, including issues related to Remote Desktop sign-in failures and certain shutdown problems on Windows 11 23H2. Nevertheless, reports from users regarding black screens and app-launch failures on Windows 11 24H2 and 25H2 persist. Some users also mentioned issues with sleep and resume functionality on particular hardware. These power-state reports differ by device and setup, and Microsoft has not broadly confirmed them like it has with the Outlook POP/PST problem.
If your PC is functioning properly after the January update, many experts recommend keeping it installed to benefit from the latest security fixes and protections included in the monthly release.
If you noticed stability issues immediately after installing KB5074109, such as black screens, ongoing app failures, or hangs in Outlook Classic, uninstalling the update is now widely regarded as a temporary measure while Microsoft develops a more comprehensive solution. The typical removal process can be done through Settings, under Windows Update history, followed by a system restart. If the system fails to boot normally, the update can also be uninstalled from the Windows recovery environment.
Microsoft and several security experts continue to caution that reverting a security update could heighten the risk of vulnerabilities. However, for users experiencing frequent crashes or unusable productivity applications, the practical advice has become clearer: stabilize your machine first, then reapply fixes when Microsoft releases a corrected version.
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