September Windows Server updates break Remote Desktop Services

September 10, 2026 · BleepingComputer · Severity: MEDIUM

This article details that September 2026 Windows Server security updates break Remote Desktop Services on multiple server versions, causing connection failures. In some cases, a hard reset is necessary to restore functionality.

Key Takeaways

Windows admins report that September 2026 security updates are causing Remote Desktop Services failures on Windows Server 2019, 2022, and 2025.
The updates prevent users from connecting via Remote Desktop and sometimes require a hard reset to restore functionality.
These failures are impacting server operations and requiring manual intervention to recover from the update's side effects.