Microsoft rushes an out-of-band update for Message Queuing bug

Microsoft has hustled out an out-of-band update to address a Message Queuing issue introduced by the December 2025 update.

The patches, released for Windows 10 22H2 ESU, Windows 10 Enterprise LTSC 2021, and Windows 10 LTSB 2016, as well as flavors of Windows Server from 2008 to 2019, include the fixes from the December 9, 2025 update, but won't leave Message Queuing (MSMQ) in a broken state.

Administrators already dealing with the MSMQ issue can install this update to resolve it.

The problem mainly affected enterprise environments – according to Microsoft, users on Pro and Home editions of Windows were "very unlikely" to encounter the issue. The cause was a change that required MSMQ to have write access to areas where administrative restrictions usually apply. The result was that message queuing could stop working, leading to some distinctly unhelpful errors.

Services such as Microsoft's web server, Internet Information Services ...