GoKawiilMicrosoft 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.
Affected systems could also experience problems with related components and tools, including Microsoft Management Console (MMC), RDS Licensing Diagnoser, File Explorer, and the Windows Update page, which could stop responding.
Microsoft has now released multiple out-of-band updates on September 14 to fix the bug, including:
Windows 11 26H1: KB5129194
Windows 11 24H2 and 25H2: KB5129195
Windows 10 21H2 and 22H2: KB5129236
Windows Server 2025: KB5129235
Windows Server 2022: KB5129237
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