I was recently having issues in taking the RDP session of a Windows 2003 server. When I use the RDP Session, it was giving me an error stating “The system cannot log you on due to the following error: The RPC server is unavailable”. This issue is dependent on the below listed reasons:
1. Incorrect DNS settings.
2. Incorrect Time and Time zone settings.
3. The “TCP/IP NetBIOS Helper” service isn’t running.
4. The “Remote Registry” service isn’t running.
In my case, the issue was due to the service “TCP/IP NetBIOS Helper” was not running. I logged on to the server using the local admin credentials and was able to start the service to fix the issue.