AWS EC2 RDP Access Fix

My Windows-based EC2 instance was always reachable over RDP, but suddenly the connection just times out—no pop-up errors, no credential screen, nothing. I have not knowingly altered any security groups or firewall rules and I’m unsure what may have triggered the lockout. I need you to jump in, isolate the root cause, and restore Remote Desktop access quickly. That could involve checking the instance reachability checks, reviewing security-group and NACL rules for port 3389, confirming Windows firewall and network driver health, or digging into the system logs via SSM Session Manager if necessary. As soon as connectivity is back, please give me a concise summary of what went wrong and the exact steps taken so I can avoid a repeat. Deliverables: • Working RDP access to the instance • Brief written recap of diagnostics and fixes applied If you can start right away and have solid AWS and Windows Server troubleshooting experience, I’d like to work with you.

Project ID: 40385376