There can be many reasons Firewall configuration. RDP service configuration Network interface configuration. EC2 Rescue requires an EC2 Windows instance that meets the following specifications: Windows Server 2008 R2 or later NET Framework 3.5 SP1 or later installed Is accessible from a Remote Desktop Protocol (RDP) connection Here are a few examples of how to use EC2Rescue to troubleshoot certain EC2 Windows Server issues: Instance connectivity issues can be resolved by using the Diagnose and Rescue feature in Offline Instance Mode. Operating system (OS) boot issues can be resolved by using the Restore feature in Offline Instance Mode. Advanced logs and troubleshooting files can be automatically captured by using the Capture Logs feature in either Current Instance Mode or Offline Instance Mode.