Science & Tech · Big Tech & Internet · 7 hrs ago
Microsoft issues emergency Windows update for activation failures
Microsoft's November Windows security updates caused activation and licensing failures for some organizations that automate those processes.
The affected systems include Windows 10, Windows 11 and Windows Server devices using the SLMGR command-line tool.
Some activation commands returned error 0x80041008, including commands to configure Key Management Service (KMS) or manage product keys.
Devices that were already activated remain activated, and customers with the right KMS setup who do not use the affected commands are not expected to be affected.
Microsoft has issued an emergency update to fix the problem after the updates disrupted business customers.
Organizations needing immediate help were advised to contact Microsoft Support for business.
Microsoft issued an emergency out-of-band Windows update to address activation and licensing failures linked to November Patch Tuesday updates.
The failures affect organizations that automate Windows activation or use the Software Licensing Management Tool (SLMGR).
Affected devices may encounter error 0x80041008 when running commands to activate Windows, configure Key Management Service (KMS) or manage product keys.
The issue affects specified Windows 10, Windows 11 and Windows Server versions.
Devices that are already activated remain activated, and some customers who do not use the affected SLMGR commands are not expected to be affected.
- Who
- Microsoft issued the update. The issue affects organizations that automate Windows activation or use SLMGR.
- What
- An emergency out-of-band update addresses Windows activation and licensing failures caused by November updates.
- When
- The failures followed the November Patch Tuesday updates; the emergency update was reported on November 13, 2026.
- Where
- On affected Windows client and Windows Server devices.
- Why
- The November updates caused errors when affected devices ran certain activation, KMS or product-key commands.
This story does not have two clearly opposing sides.
Microsoft released security updates that caused activation and licensing failures for some organizations.
Microsoft issued a service alert confirming the known activation issue.
Neowin reported that Microsoft had released an emergency out-of-band Windows update to fix the issue.
- Error code
- 0x80041008
- Affected client versions
- Windows 10 21H2/22H2 and Windows 11 23H2
- Affected server versions
- Windows Server 2019, 2022 and 2025
- Affected commands
- slmgr.vbs /skms-domain <domain> and slmgr.vbs /ipk <key>
- KMS activation period
- Typically up to 180 days after successful activation
3 sources
What people are saying
Affected devices might encounter error 0x80041008, Invalid parameter (SWbemObjectEx), when running commands to activate Windows, configure Key Management Service (KMS), or manage product keys
Devices that are already activated remain activated.