A quick google of the term gives me this article: http://support.microsoft.com/kb/944267. That tells me this is a Sharepoint service (possibly).
Do you have Sharepoint installed? I know SP does use SQL Server as a back end.
EDIT: Whoops. I may be wrong. I found another article that says:
When a member server or a domain controller is running Microsoft Windows Server 2003 and has Windows Internal Database installed, you cannot start the Microsoft SQL Server service after you do one of the following:
So maybe it's a domain controller or server thing? Or maybe it's a database internal to the Windows OS that doesn't show up on SQL Server at all.