Microsoft security updates breaks MSMQ on older Win systems
MSMQ fails on some Windows 10 and older Windows Server systems after the December 2025 security update due to NTFS permission changes requiring write access.
Windows patch causes multiple Message Queuing errors
December 2025 Windows security updates changed MSMQ folder permissions, requiring write access and causing MSMQ queues, IIS sites, and applications to fail on affected systems.