WSUS clients not reporting

Hello Experts,

Most of my windows 2000 prof clients experiencing issues while receiving update from WSUS server. Error code  "not yet reported" is logged on for all windows 2000 clients.

Following error message logged on windows  update log..

SelfUpdate    Failure    Software Synchronization    Windows Update Client failed to detect with error 0x800b010a.
2010-01-19    23:29:53:468     588    558    PT    WARNING: Cached cookie has expired or new PID is available
2010-01-19    23:29:53:468     588    558    PT    Initializing simple targeting cookie, clientId = f3b9116c-2810-4bc1-a2ab-2c6f27539353, target group = , DNS name = v2fd3.vee2slm.com
2010-01-19    23:29:53:468     588    558    PT      Server URL = http://vee2wsus/SimpleAuthWebService/SimpleAuth.asmx
2010-01-19    23:29:53:500     588    558    Report    Uploading 1 events using cached cookie, reporting URL = http://vee2wsus/ReportingWebService/ReportingWebService.asmx
2010-01-19    23:29:53:500     588    558    Report    Reporter successfully uploaded 1 events.
2010-01-20    04:15:23:771     588    20c    AU    #############
2010-01-20    04:15:23:771     588    20c    AU    ## START ##  AU: Search for updates
2010-01-20    04:15:23:771     588    20c    AU    #########
2010-01-20    04:15:23:771     588    20c    AU    <<## SUBMITTED ## AU: Search for updates [CallId = {CD4B5F50-C759-4660-A011-DCB204207754}]
2010-01-20    04:15:23:771     588    558    Agent    *************
2010-01-20    04:15:23:771     588    558    Agent    ** START **  Agent: Finding updates [CallerId = AutomaticUpdates]
2010-01-20    04:15:23:771     588    558    Agent    *********
2010-01-20    04:15:23:771     588    558    Agent      * Online = Yes; Ignore download priority = No
2010-01-20    04:15:23:771     588    558    Agent      * Criteria = "IsHidden=0 and IsInstalled=0 and DeploymentAction='Installation' and IsAssigned=1 or IsHidden=0 and IsPresent=1 and DeploymentAction='Uninstallation' and IsAssigned=1 or IsHidden=0 and IsInstalled=1 and DeploymentAction='Installation' and IsAssigned=1 and RebootRequired=1 or IsHidden=0 and IsInstalled=0 and DeploymentAction='Uninstallation' and IsAssigned=1 and RebootRequired=1"
2010-01-20    04:15:23:771     588    558    Agent      * ServiceID = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}
2010-01-20    04:15:23:864     588    558    Misc    Validating signature for C:\WINNT\SoftwareDistribution\SelfUpdate\Default\wuident.cab:
2010-01-20    04:15:23:896     588    558    Misc    WARNING: Error: 0x800b010a when verifying trust for C:\WINNT\SoftwareDistribution\SelfUpdate\Default\wuident.cab
2010-01-20    04:15:23:896     588    558    Misc    WARNING: Digital Signatures on file C:\WINNT\SoftwareDistribution\SelfUpdate\Default\wuident.cab are not trusted: Error 0x800b010a
2010-01-20    04:15:23:896     588    558    Setup    FATAL: IsUpdateRequired failed with error 0x800b010a
2010-01-20    04:15:23:896     588    558    Setup    WARNING: SelfUpdate: Default Service: IsUpdateRequired failed: 0x800b010a
2010-01-20    04:15:23:896     588    558    Setup    WARNING: SelfUpdate: Default Service: IsUpdateRequired failed, error = 0x800B010A
2010-01-20    04:15:23:896     588    558    Agent      * WARNING: Skipping scan, self-update check returned 0x800B010A
2010-01-20    04:15:25:380     588    558    Agent      * WARNING: Exit code = 0x800B010A
2010-01-20    04:15:25:380     588    558    Agent    *********
2010-01-20    04:15:25:380     588    558    Agent    **  END  **  Agent: Finding updates [CallerId = AutomaticUpdates]
2010-01-20    04:15:25:380     588    558    Agent    *************
2010-01-20    04:15:25:380     588    558    Agent    WARNING: WU client failed Searching for update with error 0x800b010a
2010-01-20    04:15:25:380     588    6e0    AU    >>##  RESUMED  ## AU: Search for updates [CallId = {CD4B5F50-C759-4660-A011-DCB204207754}]
2010-01-20    04:15:25:380     588    6e0    AU      # WARNING: Search callback failed, result = 0x800B010A
2010-01-20    04:15:25:380     588    6e0    AU      # WARNING: Failed to find updates with error code 800B010A
2010-01-20    04:15:25:380     588    6e0    AU    #########
2010-01-20    04:15:25:380     588    6e0    AU    ##  END  ##  AU: Search for updates [CallId = {CD4B5F50-C759-4660-A011-DCB204207754}]
2010-01-20    04:15:25:380     588    6e0    AU    #############
2010-01-20    04:15:25:380     588    6e0    AU    AU setting next detection timeout to 2010-01-20 03:45:25
2010-01-20    04:15:28:896     588    558    Report    REPORT EVENT: {5C90FBCE-3109-4154-AC7B-023FF332B266}    2010-01-20 04:15:23:896+0530    1    148    101    {D67661EB-2423-451D-BF5D-13199E37DF28}    0    800b010a    SelfUpdate    Failure    Software Synchronization    Windows Update Client failed to detect with error 0x800b010a.
2010-01-20    04:29:55:605     588    558    PT    WARNING: Cached cookie has expired or new PID is available
2010-01-20    04:29:55:605     588    558    PT    Initializing simple targeting cookie, clientId = f3b9116c-2810-4bc1-a2ab-2c6f27539353, target group = , DNS name = v2fd3.vee2slm.com
2010-01-20    04:29:55:605     588    558    PT      Server URL = http://vee2wsus/SimpleAuthWebService/SimpleAuth.asmx
2010-01-20    04:29:55:621     588    558    Report    Uploading 1 events using cached cookie, reporting URL = http://vee2wsus/ReportingWebService/ReportingWebService.asmx
2010-01-20    04:29:55:621     588    558    Report    Reporter successfully uploaded 1 events.
2010-01-20    07:21:01:431     588    20c    AU    AU received policy change subscription event

i did a extensive google search and found nothing useful.

What does the error code 0x800B010A refers to? Where can i get all possible WSUS error codes and fix to the respective error code?

Please advise. Thanks.

Best,
Kones.S