Organizations that implemented Microsoft’s September 2026 security updates are now facing unexpected challenges with Remote Desktop Services (RDS) on their Windows Server systems. This situation has led to instability and connection failures, disrupting user access and necessitating urgent troubleshooting for businesses that depend on remote administration, virtual desktops, and terminal services.
Reports indicate that while Windows Server machines may initially function normally post-update, issues typically surface hours later. Microsoft has issued warnings that ongoing Remote Desktop sessions may freeze, users may struggle to disconnect, and attempts to establish new connections often result in failure. In some instances, IT teams have had to resort to hard resets to regain access, introducing operational risks for those managing critical workloads remotely.
How does the RDS issue affect Windows Server environments?
Microsoft has confirmed that this issue impacts a range of supported platforms, including Windows Server 2012 through Windows Server 2025, as well as select Windows client versions. Affected systems may experience a variety of problems, including failed RDP connections, difficulties during sign-in, unresponsive management tools, and servers stalling during the Remote Desktop configuration process.
As Microsoft elaborated, “In some environments, RDS might become unstable, resulting in RDP connections failing after several minutes, sign-in issues, or servers hanging at ‘Please wait for the Remote Desktop Configuration.’ Related tools, including Microsoft Management Console (MMC), RDS Licensing Diagnoser, and File Explorer might also become unresponsive. Additionally, the Windows Update page might stop responding and continuously display a loading indicator.”
What IT administrators should do next?
In light of these challenges, Microsoft suggests that administrators uninstall the September 2026 updates from their Windows Server machines. However, this action comes with a significant trade-off, as it also removes the security enhancements included in the latest Patch Tuesday release, potentially exposing systems to vulnerabilities.
To assist enterprise customers in navigating this issue, Microsoft is actively investigating the root cause and has published Known Issue Rollback policies. These measures aim to help mitigate the problem until a permanent solution is implemented. For virtual machines that become inaccessible, Microsoft recommends stopping and restarting the affected VM as a temporary measure to restore connectivity.
