While attempting to promote a server to a domain controller, the server unexpectedly reboots before completing the process. An entry similar to the following is written to the event log:
Alert: USER32 Event
Source: <full computer name>
Last modified by: System
Last modified time: <time>
Alert Description: The process wininit.exe has initiated the restart of computer on behalf of user for the following reason: No title for this reason could be found
Reason Code: 0x50006
Shutdown Type: restart
Comment: The system process 'C:\Windows\system32\lsass.exe' terminated unexpectedly with status code 255. The system will now shut down and restart.
The DC promotion process results in the configuration, starting, and stopping of several services. If those services are started during the course of the DC promotion process, this problem can arise.
Ensure that no system services are started during the course of DC promotion. Services can be started by group policy settings enforced during an unexpected GPUPDATE, or by other applications.