This month’s extended security update for Windows 10 broke Message Queuing (MSMQ), which is typically used by enterprises to manage background tasks.

Microsoft says it identified a fix and is now rolling out an out-of-band update (KB5074976) via Update Catalog to address it.

You won’t find the OOB on Windows Update or WSUS, as it’s only offered via Update Catalog, but if you are affected, you should download the out-of-band release.