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Microsoft released out-of-band updates to address Remote Desktop Services failures and Hyper-V and USB audio issues that appeared after the September 2026 security updates. Some USB Audio Class 1.0 device failures remain under investigation.
System administrators reported Remote Desktop Services outages after installing Microsoft’s September 2026 cumulative security updates on Windows Server 2019, 2022, and 2025. Reports indicate connection failures and hanging sessions, while Microsoft had not confirmed the cause or provided an official solution at the time of publication.