Windows Server Activation Error 0x80041008 After the November 2026 Update: Microsoft Releases Out-of-Band Fix on 13 November

Published: 14 November 2026 · By Abdullah Mohammed · Editorial policy

In brief: On 13 November 2026, Microsoft released an out-of-band (OOB) update to fix Windows licensing and activation errors that appeared after installing the November 2026 Windows security update. Activation operations using SLMGR can fail with error 0x80041008 (Invalid parameter), on Windows Server 2025, 2022 and 2019 among others. Devices that are already activated remain activated.

What did Microsoft confirm?

According to the official Windows message center on Microsoft Learn, the issue affects “a limited number of enterprise devices” after installing the November 2026 Windows security update (released on 10 November). Certain licensing and activation operations performed with the Software Licensing Management Tool (slmgr.vbs) might fail with error 0x80041008.

Microsoft says the problem primarily affects organizations that use slmgr.vbs commands or automated processes to:

• configure Key Management Service (KMS) activation,
• install product keys, or
• manage Windows licensing.

Devices that were already activated remained activated, and devices with existing KMS configurations that did not require additional slmgr.vbs commands were not affected, according to KB5136490. BleepingComputer reported on 13 November that the error appears when running the /skms-domain and /ipk commands.

The out-of-band fix: KB numbers by version

The update is optional and non-security, and it includes the improvements from the November 2026 security update. Microsoft lists:

• Windows Server 2025: KB5136489
• Windows Server 2022: KB5136487
• Windows Server 2019 and Windows 10 Enterprise LTSC 2019: KB5136490 (OS Build 17763.9488)
• Windows 11, version 23H2: KB5136483
• Windows 10, version 22H2 (ESU) and Windows 10 Enterprise LTSC 2021: KB5136493

Important: for Windows Server 2025, 2022 and 2019, the update is available only from the Microsoft Update Catalog and will not arrive automatically through Windows Update. Windows 11 23H2 can also get it from Optional updates in Windows Update settings.

What does this mean for your system?

RivDesktop by Riv-ERP runs on .NET and Windows with a SQL Server database on the business’s own server. This news matters if you are preparing a new server for the system or changing the Windows license key on an existing one. Practical steps:

• If your server is activated and you are not changing its license: Microsoft says activated devices stay activated, so no urgent action is needed; keep your normal monthly update plan.
• If you are setting up a new server or moving the system and see error 0x80041008 when entering a key or configuring KMS: download the update for your version from the Microsoft Update Catalog, install it, then retry activation.
• Test first on a test server if you have one, back up the database before installing, and schedule the restart outside working hours so invoices and journal entries are not interrupted.

This is the second known issue in Windows Server updates within days, after the SQL Server linked server connections issue after the October 2026 update. For a monthly patching routine, see SQL Server security updates for October 2026. Riv-ERP Cloud runs on Oracle APEX and Oracle Database on Oracle Cloud, not on a Windows server at the customer site. You can also request a quote and contact us to review your server environment.

Note: this article is general information based on Microsoft’s announcement as of publication; Microsoft may update the details later.

Sources

• Microsoft Learn — Windows message center: Out-of-band update released to address Windows licensing and activation errors (13 November 2026)
• Microsoft Support — KB5136490 (OS Build 17763.9488) Out-of-band, 13 November 2026
• BleepingComputer — Microsoft confirms Windows activation failures after November updates (13 November 2026)