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Windows Server 2019 Windows Server 2019 Out-of-band update
Out-of-band

KB5136490

KB5136490: Cumulative update for Windows Server, version 2019, November 2026. SLMGR licensing failures with error 0x80041008 fixed

In short

Certain Windows licensing and activation operations using SLMGR might fail with error 0x80041008; this out-of-band update fixes the problem. It mainly affected organizations using SLMGR commands or automation.

Does it affect you? Applies to: Windows Server 2019 devices, with an x64 package.

Build
17763.9488
Restart
Required

Microsoft publishes separate notes for this KB for Windows 10.

What changes

Fix 1 change

Licensing and Activation

For: Organizations using SLMGR commands or automation

  • Some licensing and activation tasks that use SLMGR can fail with error 0x80041008. This issue is fixed.1
    Primarily affects organizations using slmgr.vbs commands or automated processes for KMS activation, product key installation, or Windows licensing. Already activated devices and existing KMS setups that need no additional slmgr.vbs commands are not affected.

Improvement 1 change

Servicing stack

  • The servicing stack checks whether a device runs on Azure using an updated certificate chain.2
    SSU KB5131084, build 17763.9478, adds logic to verify Azure hosting and uses an updated certificate chain for validation.

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
+28 earlier KB5122876, KB5120238, KB5099538, KB5094123, KB5087538, KB5091573, KB5082123, KB5078752, KB5075904, KB5078131, KB5077795, KB5073723, KB5074975, KB5071544, KB5068791, KB5070883, KB5066586, KB5065428, KB5066187, KB5063877, KB5062557, KB5060531, KB5061978, KB5058392, KB5059091, KB5058922, KB5050008, KB5037425
VersionBuildChannel
2019 17763.9488 General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 2019
869.3 MB
windows10.0-kb5136490-x64.msu Main update · KB5136490 SHA-1: 54372ded…3189b0

Updated components

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

Top changed componentsFiles
Audio11
Graphics and display2
Hyper-V and virtualization2
Secure Boot2
Storage and file systems2
Kernel1
Security and sign-in1

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 5/5, clarity 3/5, 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