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Windows Server 2016 Windows Server 2016 Out-of-band update
Out-of-band

KB5074974

KB5074974: Cumulative update for Windows Server, version 2016, December 2025. Message Queuing failures after the December update resolved

In short

Fixes Message Queuing problems that appeared after the December 9, 2025 updates, including in clustered environments under load.

Does it affect you? Applies to: Devices running Windows Server 2016.

Build
14393.8692
Restart
Required

Microsoft publishes separate notes for this KB for Windows 10.

What changes

Fix 1 change

Message queuing (MSMQ) (known issue)

For: Primarily enterprise or managed IT environments

  • Message Queuing works again after the December 9, 2025 updates caused queues to become inactive or prevented applications from writing messages. The issue also affected clustered environments under load.1
    The issue could also produce messages about insufficient resources, failed message creation, or insufficient disk space or memory. It primarily affected enterprise or managed IT environments; Windows Home and Pro users on personal devices were very unlikely to experience it.

Technical details

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

Data sheet

Released
2025-12-18
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5071543, KB5068864, KB5070882, KB5066836
+13 earlier KB5065427, KB5063871, KB5062560, KB5061010, KB5058383, KB5058921, KB5055521, KB5053594, KB5052006, KB5049993, KB5048671, KB5046612, KB5037423
Replaced by
KB5073722
VersionBuildChannel
2016 14393.8692 General availability

Security

No vulnerabilities are listed for this update.

Updated components

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

Top changed componentsFiles
Hyper-V and virtualization5
File Explorer and shell3
Settings2
Kernel1
Secure Boot1

Sources

Updated
Cited passages from Microsoft's official notes (1)
  1. 1. Fixed: After installing the Windows updates released on December 9, 2025, users experienced issues with the Message Queuing (MSMQ) functionality. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage · compared with Microsoft's page on Oct 20, 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 5/5, 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