Microsoft Releases Emergency Windows Updates to Fix Activation Error 0x80041008

Microsoft has released five emergency out-of-band (OOB) cumulative updates to fix Windows activation failures caused by the November 2026 Patch Tuesday updates.

The emergency fixes target affected versions of Windows 10, Windows 11, and Windows Server, arriving just days after the original security updates.

Microsoft fixes Windows activation error 0x80041008

The November 2026 security updates introduced an issue that caused Windows activation and licensing operations to fail with error 0x80041008.

The problem primarily affected organizations using automated activation tools and the Software Licensing Management Tool (SLMGR). Certain licensing commands could fail, preventing administrators from managing Windows activation and Key Management Service (KMS) configurations.

Microsoft has now released five cumulative updates to resolve these failures across the affected Windows versions.

Five emergency Windows updates are now available

Microsoft has published the following emergency updates:

• Windows Server 2025 – KB5136489.
• Windows Server 2022 – KB5136487.
• Windows Server 2019 and Windows 10 Enterprise LTSC 2019 – KB5136490.
• Windows 11 23H2 – KB5136483.
• Windows 10 22H2 ESU and Windows 10 Enterprise LTSC 2021 – KB5136493.

All five updates are cumulative, meaning they include previously released security fixes and improvements.

Administrators who have not yet installed the November Patch Tuesday updates can install the new cumulative updates directly without deploying the earlier releases first.

How to install the emergency Windows updates

Microsoft is distributing the emergency patches through different channels depending on the Windows version.

For Windows Server and Windows 10, administrators can download the applicable updates from the Microsoft Update Catalog and install them manually.

Windows 11 23H2 users can obtain KB5136483 through the Microsoft Update Catalog or navigate to Settings > Windows Update > Advanced options > Optional updates to check for its availability.

Organizations experiencing activation failures should select the cumulative update that matches their Windows version.

November 2026 Windows updates have caused other problems

The activation failures are not the only issues associated with Microsoft’s November 2026 security updates.

Microsoft has also confirmed printing failures affecting certain documents containing images with zero height or width.

Separately, Windows 11 KB5132061 has disrupted Windhawk mods, although a temporary workaround is available. Microsoft has also warned about PowerShell script compatibility issues following the same update.

The newly released emergency cumulative updates specifically address the activation and licensing failures.

Via Neowin