Internal error: There was a problem retrieving or processing data from the directory. The context value associated with this event is %1; the product id is %2. You may wish to stop and restart this Windows Domain Controller and try again. Other event log messages may provide further indication of the nature of the problem.

Details
Product:	Windows Operating System
Event ID:	1023
Source:	Active Directory
Version:	5.0
Symbolic Name:	DIRLOG_CODE_INCONSISTENCY
Message:	Internal error: There was a problem retrieving or processing data from the directory. The context value associated with this event is %1; the product id is %2. You may wish to stop and restart this Windows Domain Controller and try again. Other event log messages may provide further indication of the nature of the problem.

Explanation
Internal error: Active Directory could not retrieve or process data.

User Action
Restart the local domain controller, and then try again.