The system cannot log you on due to the following error: The RPC server is unavailable

CAUSE

There can be a few reasons for this problem:

     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.

RESOLUTION

1. Verity correct DNS settings.

               Troubleshooting "RPC Server is Unavailable" in Windows
              

    2. Verity correct Time and Time Zone settings.

    3. Verity that "TCP/IP NetBIOS Helper" is running and set to auto start after restart.

    4. Verity that "Remote Registry" is running and set to auto start after restart.

•      Its recommended to reboot the computer after changing the required settings.