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Windows 10 1809 Windows 10 1809 Out-of-band update
Out-of-band

KB5136490

KB5136490: Cumulative update for Windows 10, version 1809, November 2026. SLMGR licensing and activation errors fixed

In short

Some Windows licensing and activation tasks no longer fail with error 0x80041008. The problem mainly affected organizations managing activation or product keys with commands.

Does it affect you? Applies to: Devices running Windows 10 Enterprise LTSC 2019, version 1809.

Build
17763.9488
Restart
Required

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fix 1 change

Licensing and Activation

For: organizations managing Windows licensing

  • Windows licensing and activation tasks that failed with error 0x80041008 are fixed.1
    The issue primarily affected organizations using slmgr.vbs commands or automated processes to configure KMS activation, install product keys, or manage Windows licensing. Already activated devices and existing KMS setups that needed no additional slmgr.vbs commands were not affected.

Improvement 1 change

Servicing stack update (SSU)

  • The servicing stack update adds a check to verify whether a device is hosted on Azure.2
    The check uses an updated certificate chain. Devices need access to the required certificate update domains to download and install certificate updates.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-11-13
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5131085, KB5134124, KB5126651, KB5129238
+27 earlier KB5122876, KB5120238, KB5099538, KB5094123, KB5087538, KB5091573, KB5082123, KB5078752, KB5075904, KB5078131, KB5077795, KB5073723, KB5074975, KB5071544, KB5068791, KB5066586, KB5065428, KB5066187, KB5063877, KB5062557, KB5060531, KB5061978, KB5058392, KB5059091, KB5058922, KB5050008, KB5037425
VersionBuildChannel
1809 17763.9488 General availability

Security

No vulnerabilities are listed for this update.

Updated components

645 files changed since the previous update for the same versions.

Top changed componentsFiles
Audio17
Graphics and display4
Secure Boot4
Security and sign-in4
Hyper-V and virtualization3
Storage and file systems3
Kernel2

Page history

  1. Now also covers build 17763.9488 (1809)

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. Fixed: An issue where certain Windows licensing and activation operations using the Software Licensing Management Tool (SLMGR) might fail with error 0x80041008 (Invalid parameter). support.microsoft.com
  2. 2. This servicing stack update (SSU) includes enhanced logic to verify whether a device is hosted on Azure, leveraging an updated certificate chain for validation. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Nov 15, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 4/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake