September Windows Server updates break Remote Desktop Services
September 2026 updates cause RDS failures on Windows Server 2019, 2022, and 2025 systems, requiring server resets to restore functionality.
Intelligence analysis by Qwen 2.5 (3B)
Microsoft September 2026 updates break Remote Desktop Services (RDS) on Windows Server 2019, 2022, and 2025 systems, leading to connection issues and server resets.
Some updates from Microsoft broke a way to connect to computers remotely. This made it hard for people to use their work computers, so they had to restart their servers to fix it.
Analysis
Administrators have reported that the RDP service becomes unresponsive when users begin logging out. Debugging showed a deadlock between Remote Desktop and the Local Session Manager. The service hangs at RDPSERVERBASE!WDLIB_Close, with no timeout set. This results in a deadlock between RDP and LSM. Microsoft has not confirmed this as the cause of the failures, but the issue affects all Windows Server releases, including Server 2019, Server 2022, and Server 2025.
Key points
- September 2026 updates broke Remote Desktop Services (RDS) on Windows Server 2019, 2022, and 2025 systems
- Administrators reported issues with connections and server resets
- The issue affects all Windows Server releases, including Server 2019, Server 2022, and Server 2025
- Administrators reported that rolling back the updates resolved the problems
- Microsoft acknowledged the issue and is investigating
Fixing the issue will allow people to use their work computers again and continue their work.
If the issue is not fixed, people might not be able to use their work computers remotely, which could cause problems with their jobs.
