In addition to the subject message, your System event log records:
Event Type: Error
Event Source: NTDS
Event ID: 1450
Description: Insufficient system resources exist to complete the requested service.
This behavior will occur if the SQL database is larger than 4 gigabytes AND you had installed the 316430 - Performance of Microsoft Commerce Server-based Programs May Degrade Over Time hotfix.
To resolve this problem, uninstall the hotfix, using Control Panel / Add/Remove Programs.