KB5074978: Overview with user sentiment and feedback
Last Updated January 31, 2026
Probability of successful installation and continued operation of the machine
Overview
This out-of-band update for Windows Server 2012 R2 includes fixes and improvements that are part of the December 9, 2025 KB5071503 (Monthly Rollup) update. The key change documented in this update is a fix for issues with Message Queuing (MSMQ) functionality that were introduced in the December 2025 updates. This issue primarily affected enterprise or managed IT environments, leading to problems like message queues becoming inactive, insufficient resource errors, and applications unable to write to message queues. The update resolves these MSMQ-related problems.
General Purpose
The primary purpose of this out-of-band update is to address issues with Message Queuing (MSMQ) that were introduced in the previous December 2025 updates. After installing those updates, users experienced problems with MSMQ functionality, including message queues becoming inactive, error messages about insufficient resources, and applications unable to write to message queues. This update fixes those MSMQ-related problems. It also includes other general security and reliability improvements that were part of the December 2025 Monthly Rollup.
General Sentiment
Based on the information provided, the sentiment around this out-of-band update appears to be generally positive. The update resolves a significant issue with MSMQ that was impacting enterprise and managed IT environments after the previous December 2025 updates. While the known issues summary does not indicate any additional problems with this update, the fact that it is an out-of-band release suggests there may have been enough urgency to warrant a standalone fix, rather than waiting for the next regular Monthly Rollup. Overall, this update seems aimed at addressing an important problem and improving the reliability of Windows Server 2012 R2 systems.
Known Issues
- The installation of this Extended Security Update (ESU) might fail when trying to install it on an Azure Arc-enabled device running Windows Server 2012 R2. To successfully install, ensure all Subset of endpoints for ESU only are met as described in the Connected Machine agent network requirements.
Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2026-01-31 01:18 AM
