Microsoft has released emergency out-of-band Windows updates to fix Remote Desktop Services failures caused by this month’s security updates, along with Hyper-V and USB audio problems on some Windows versions.

The September 2026 security updates caused Remote Desktop Services (RDS) to become unstable on affected systems, leading to RDP connection and sign-in failures and, in some cases, unresponsive servers.

Microsoft previously acknowledged the issue after Windows administrators reported widespread RDS problems following the September updates.