KB5074976: [Message queuing (MSMQ) (known issue)] Fixed

December 18, 2025—KB5074976 (OS Builds 19044.6693 and 19045.6693) Out-of-band

Applies to: Windows 10, version 22H2

This out-of-band update includes fixes and improvements that are a part of the following updates:

• December 9, 2025—KB5071546 (OS Builds 19045.6691 and 19044.6691)

The following is a summary of the key issues that this update addresses when you install this update. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

• [Message queuing (MSMQ) (known issue)] Fixed: After installing the Windows updates released on December 9, 2025, users experienced issues with the Message Queuing (MSMQ) functionality. This issue also impacts a clustered MSMQ environment under load. This issue might lead to message queues becoming inactive, messages about insufficient resources, applications unable to write to message queues, error messages about the message cannot be created, or messages about insufficient disk space or memory. Individuals using Windows Home or Pro editions on personal devices are very unlikely to experience this issue. This issue primarily affects enterprise or managed IT environments.