Event 36888: The following fatal alert was generated: 10. The internal error state is 1203

I realize that you are not running IIS, but it appears other processes can cause this error message as well.

This might help:

http://social.technet.microsoft.com/Forums/en/winserverDS/thread/4c5430f5-43f6-41b4-97d3-03cfb3efa70b