MOSS Errors in event log

These are the errors, I see everyday....
-------------------------------------------------------------------------------------
Event Type: Error
Event Source: Office Server Search
Event Category: Gatherer
Event ID: 10036
Date: 8/22/2007
Time: 6:23:45 AM
User: N/A
Computer: ApplicationServer
Description:
A database error occurred.

Source: Microsoft OLE DB Provider for SQL Server
Code: 17 occurred 1 time(s)
Description: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.

Context: Application '72a8496b-8f45-40e0-9c3b-0bfeb9565e52'

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

-------------------------------------------------------------------------------------

Event Type: Error
Event Source: Windows SharePoint Services 3
Event Category: General
Event ID: 27745
Date: 8/22/2007
Time: 6:23:56 AM
User: N/A
Computer: ApplicationServer
Description:
The description for Event ID ( 27745 ) in Source ( Windows SharePoint Services 3 ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: #50071: Unable to connect to the database SharePointConfig on sqlserver. Check the database connection information and make sure that the database server is running..

-------------------------------------------------------------------------------------


Event Type: Error
Event Source: Office SharePoint Server
Event Category: Office Server Shared Services
Event ID: 6482
Date: 8/22/2007
Time: 6:41:26 AM
User: N/A
Computer: ApplicationServer
Description:
Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (0a1fd5de-493b-4cf7-b48e-7920103d4628).

Reason: Object 72a8496b-8f45-40e0-9c3b-0bfeb9565e52 not found.

Techinal Support Details:
System.Collections.Generic.KeyNotFoundException: Object 72a8496b-8f45-40e0-9c3b-0bfeb9565e52 not found.
at Microsoft.Office.Server.Search.Administration.SearchApi.get_App()
at Microsoft.Office.Server.Search.Administration.SearchApi.SetUsersPermittedToQuery(String[] userNames, Boolean force)
at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.Synchronize()
at Microsoft.Office.Server.Administration.ApplicationServerJob.ProvisionLocalSharedServiceInstances(Boolean isAdministrationServiceJob)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

-------------------------------------------------------------------------------------

Event Type: Error
Event Source: Office SharePoint Server
Event Category: Office Server Shared Services
Event ID: 6482
Date: 8/22/2007
Time: 8:18:36 AM
User: N/A
Computer: ApplicationServer
Description:
Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (0a1fd5de-493b-4cf7-b48e-7920103d4628).

Reason: The trust relationship between this workstation and the primary domain failed. (Exception from HRESULT: 0x800706FD)

Techinal Support Details:
System.Runtime.InteropServices.COMException (0x800706FD): The trust relationship between this workstation and the primary domain failed. (Exception from HRESULT: 0x800706FD)
at Microsoft.Office.Server.Search.Administration.MSSITLB.IGatherApplication2.SetUsersPermittedToQuery(String[] psaAccountNames, Int32 fForce)
at Microsoft.Office.Server.Search.Administration.SearchApi.SetUsersPermittedToQuery(String[] userNames, Boolean force)
at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.Synchronize()
at Microsoft.Office.Server.Administration.ApplicationServerJob.ProvisionLocalSharedServiceInstances(Boolean isAdministrationServiceJob)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.


-------------------------------------------------------------------------------------

Event Type: Error
Event Source: Windows SharePoint Services 3 Search
Event Category: Gatherer
Event ID: 2424
Date: 8/23/2007
Time: 6:45:02 PM
User: N/A
Computer: WebServer
Description:
The update cannot be started because the content sources cannot be accessed. Fix the errors and try the update again.

Context: Application 'Search', Catalog 'index file on the search server Search'

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
-------------------------------------------------------------------------------------