SharePoint: Errors 6482, 6398

The Event Log on our MOSS 2007 server was filled with alternating error codes 6482 and 6398.

6482:
Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (dc8cedfd-9340-42bb-adee-57e75040cdf6).

Reason: Retrieving the COM class factory for component with CLSID {3D42CCB1-4665-4620-92A3-478F47389230} failed due to the following error: 80070005.
...

6398:
The Execute method of job definition Microsoft.Office.Server.Search.Administration.IndexingScheduleJobDefinition (ID 66aead00-c73c-4e06-a1ce-ac86070bb9da) threw an exception. More information is included below.

Retrieving the COM class factory for component with CLSID {3D42CCB1-4665-4620-92A3-478F47389230} failed due to the following error: 80070005.
...

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After a little bit of Google researching, I found that the service account used by the "Windows SharePoint Services Search" service did not have appropriate rights to launch, activate, and access the DCOM component oSearch.

Give the service account Local Launch and Local Activation permissions in the "Launch and Activation permissions" portion of the oSearch DCOM component properties dialog. Also, give the service account Local Access permissions in the "Access Permissions" portion of the properties. Save the changes and restart the "Windows SharePoint Services Search" service and you should be good to go.

Thanks to the folks at Tahoe Solutions for posting this on their blog: http://tahoesolutions.blogspot.com/2008/01/event-6482-and-6398-errors-in-event.html.