KB5074974: Cumulative update for Windows 10, version 1607, December 2025. Restores Message Queuing after the December updates

Message Queuing issues caused by the December 9 updates are fixed, including problems in clustered environments under load. This out-of-band update is available only from the Microsoft Update Catalog.

Does it affect you? Applies to: Devices running Windows 10 Enterprise LTSB 2016, version 1607, in x64 or x86.

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fix 1 change

Message queuing (MSMQ) (known issue)

For: Enterprise or managed IT environments

Message Queuing issues that appeared after the December 9 updates are fixed. They included inactive queues, resource errors, and problems writing messages, including in clustered environments under load.¹
Fixes the MSMQ functionality issue affecting clustered MSMQ environments under load.

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, KB5066836, KB5065427

+12 earlier
KB5063871, KB5062560, KB5061010, KB5058383, KB5058921, KB5055521, KB5053594, KB5052006, KB5049993, KB5048671, KB5046612, KB5037423
Replaced by: KB5073722

Version	Build	Channel
1607	14393.8692	General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 1607

1.6 GB

windows10.0-kb5074974-x64.msu Main update · KB5074974 SHA-1: e0585e14…0a05a8

x86 1607

0.9 GB

windows10.0-kb5074974-x86.msu Main update · KB5074974 SHA-1: 88ea116c…23a083

Updated components

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

Top changed components	Files
File Explorer and shell	6
Hyper-V and virtualization	5
Settings	4
Kernel	2
Secure Boot	2

Sources

Microsoft Support: KB5074974

Updated Oct 27, 2026

Cited passages from Microsoft's official notes (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 5/5, clarity 4/5, completeness 4/5. 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