Overview

Microsoft has recently addressed a critical issue affecting Remote Desktop Protocol (RDP) sessions in Windows 11 version 24H2 and Windows Server 2025. Users reported that RDP sessions would freeze shortly after connection, rendering mouse and keyboard inputs unresponsive. This necessitated disconnecting and reconnecting to restore functionality.

Background

The problem emerged following the installation of the February 2025 Security Update (KB5051987), released on February 11, 2025. Both Windows 11 24H2 and Windows Server 2025 users experienced these disruptions, significantly impacting remote management and support operations.

Technical Details

The freezing issue was linked to updates affecting the RDP's handling of network detection and connection stability. Specifically, the updates introduced changes that inadvertently caused RDP sessions to become unresponsive under certain conditions.

Resolution

Microsoft released the KB5055523 update on April 8, 2025, to resolve this issue. The update includes quality improvements and addresses the RDP freezing problem by correcting the underlying network detection mechanisms. Users are advised to install this update promptly to restore normal RDP functionality.

Implications for IT Professionals

The RDP freezing issue underscores the importance of thorough testing and monitoring following the deployment of security updates. IT administrators should:

  • Stay Informed: Regularly review Microsoft's update release notes and known issues to anticipate potential problems.
  • Implement Staged Rollouts: Deploy updates in phases to monitor and address issues before they affect the entire organization.
  • Maintain Backup Plans: Have contingency measures in place, such as alternative remote access solutions, to ensure continuity during unexpected disruptions.

Conclusion

While Microsoft's swift response with the KB5055523 update has mitigated the RDP freezing issue, this incident highlights the need for vigilant update management and proactive troubleshooting within IT infrastructures.