Microsoft confirms Windows activation failures after November 2026 Patch Tuesday updates
Microsoft has acknowledged a known issue introduced by the November 2026 Patch Tuesday security updates that causes Windows activation and licensing failures, manifesting as error code 0x80041008. This problem primarily affects organizations automating Windows activation or using the Software Licensing Management Tool (SLMGR) command-line utility, especially when running commands like 'slmgr.vbs /skms-domain ' and 'slmgr.vbs /ipk '. Systems running Windows 10 21H2/22H2, Windows 11 23H2, and Windows Server 2019/2022/2025 are impacted. Devices already activated remain so, and those with KMS client keys installed in their images without using SLMGR are unaffected. Microsoft is working on a fix expected within days and advises affected organizations requiring immediate help to contact Microsoft Support for Business. This follows recent similar activation and update issues reported earlier in 2026.
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Microsoft confirms Windows activation failures after November 2026 Patch Tuesday updates
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Microsoft has acknowledged a known issue introduced by the November 2026 Patch Tuesday security updates that causes Windows activation and licensing failures, manifesting as error code 0x80041008. This problem primarily affects organizations automating Windows activation or using the Software Licensing Management Tool (SLMGR) command-line utility, especially when running commands like 'slmgr.vbs /skms-domain ' and 'slmgr.vbs /ipk '. Systems running Windows 10 21H2/22H2, Windows 11 23H2, and Windows Server 2019/2022/2025 are impacted. Devices already activated remain so, and those with KMS client keys installed in their images without using SLMGR are unaffected. Microsoft is working on a fix expected within days and advises affected organizations requiring immediate help to contact Microsoft Support for Business. This follows recent similar activation and update issues reported earlier in 2026.