Microsoft has released emergency out-of-band cumulative updates to fix an activation bug that could prevent IT administrators from running KMS licensing scripts after the November 10 Patch Tuesday updates. The issue primarily affected deployments using slmgr.vbs to automate Windows activation and license configuration.
The affected commands could return error 0x80041008, or “Invalid parameter,” including slmgr.vbs /ipk for installing a product key and slmgr.vbs /skms-domain for configuring a KMS server. Systems that were already activated did not lose their licenses; the problem emerged when organizations attempted to configure or reactivate machines through scripts.
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Microsoft’s out-of-band releases cover the following versions:
- Windows 11 23H2 — KB5136483
- Windows 10 22H2 with ESU and Enterprise LTSC 2021 — KB5136493
- Windows 10 Enterprise LTSC 2019 and Windows Server 2019 — KB5136490
- Windows Server 2022 — KB5136487
- Windows Server 2025 — KB5136489
For most consumer PCs, the bug should have no immediate effect. It does not suddenly deactivate an already licensed Windows installation. Its impact is more significant for managed fleets, where a scripted setup or reactivation process can affect large numbers of newly deployed systems.
On Windows 11 23H2, KB5136483 is offered through Settings > Windows Update > Advanced options > Optional updates. Administrators can also obtain the packages from the Microsoft Update Catalog. The releases are cumulative, so they include the relevant Patch Tuesday fixes as well as the KMS activation correction.
The fix also extends to enterprise and ESU-supported Windows 10 versions, alongside multiple Windows Server releases, underscoring that the incident was concentrated in business licensing workflows rather than ordinary consumer activation.
