Overview

Microsoft has recently addressed a critical issue affecting Remote Desktop Protocol (RDP) sessions in Windows environments. This problem, introduced by the February 2025 Security Update (KB5051987), caused RDP sessions to freeze shortly after connection, rendering mouse and keyboard inputs unresponsive. Users were compelled to disconnect and reconnect to regain control. The issue impacted both Windows 11 version 24H2 and Windows Server 2025 systems.

Background

RDP is a vital tool for IT administrators, enabling remote management and support of systems. The freezing issue emerged following the installation of KB5051987, released on February 11, 2025. Users reported that RDP sessions would become unresponsive shortly after initiation, disrupting remote management tasks and daily operations.

Resolution Timeline

  • February 25, 2025: Microsoft released the KB5052093 optional update, which addressed the RDP freezing issue for Windows 11 24H2 systems. Users were encouraged to install this update to restore normal RDP functionality.
  • April 8, 2025: The KB5055523 cumulative update was released, providing a fix for Windows Server 2025 systems. Microsoft recommended that administrators install this update to resolve the RDP freezing problem on affected servers.

Technical Details

The RDP freezing issue was linked to changes introduced in the February 2025 Security Update. While specific technical details were not disclosed, the problem manifested as follows:

  • Symptom: RDP sessions would freeze shortly after connection, with mouse and keyboard inputs becoming unresponsive.
  • Affected Systems: Windows 11 version 24H2 and Windows Server 2025.
  • Resolution: Installation of the respective updates (KB5052093 for Windows 11 24H2 and KB5055523 for Windows Server 2025) restored normal RDP functionality.

Implications for IT Professionals

The RDP freezing issue underscores the importance of vigilant patch management and thorough testing of updates before deployment. IT professionals should consider the following:

  • Testing: Implement a robust testing protocol for updates in a controlled environment before widespread deployment.
  • Monitoring: Stay informed about known issues associated with updates by regularly consulting Microsoft's release notes and support channels.
  • Rollback Plans: Develop contingency plans to roll back updates if critical issues arise post-deployment.

Conclusion

Microsoft's resolution of the RDP freezing issue highlights the complexities of patch management in enterprise environments. By staying informed and implementing proactive strategies, IT professionals can mitigate the impact of similar issues in the future.