У меня 100 компов в сетке. через неделю в WSUS попали 48, причём, некоторые из них имеют одинаковый SID! (смотрел в NewSID от systernals) А где спрашивается остальные 52? Вот пример лога на неопознанном компе. 
   2005-10-07    08:33:37    1088    450    Agent    ** START **  Agent: Finding updates [CallerId = AutomaticUpdates] 
 2005-10-07    08:33:37    1088    450    Agent    ********* 
 2005-10-07    08:33:37    1088    78c    AU    <<## SUBMITTED ## AU: Search for updates [CallId = {AA591222-C51A-4165-B60A-70BE218679F6}] 
 2005-10-07    08:33:49    1088    450    Setup    ***********  Setup: Checking whether self-update is required  *********** 
 2005-10-07    08:33:49    1088    450    Setup      * Inf file: C:\WINDOWS\SoftwareDistribution\SelfUpdate\Default\wusetup.inf 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\cdm.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\iuengine.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuapi.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wuapi.dll.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuauclt.exe: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wuauclt.exe.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuauclt1.exe: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wuauclt1.exe.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuaucpl.cpl: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:49    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wuaucpl.cpl.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuaueng.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuaueng1.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wuaueng1.dll.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wucltui.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\MUI\FALLBACK\0419\wucltui.dll.mui: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wups.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wups2.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup    Update NOT required for C:\WINDOWS\system32\wuweb.dll: target version = 5.8.0.2469, required version = 5.8.0.2469 
 2005-10-07    08:33:50    1088    450    Setup      * IsUpdateRequired = No 
 2005-10-07    08:33:50    1088    450    PT    +++++++++++  PT: Synchronizing server updates  +++++++++++ 
 2005-10-07    08:33:50    1088    450    PT      + ServiceId = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}, Server URL = 
http://router/ClientWebService/client.asmx  2005-10-07    08:33:50    1088    450    PT    Initializing simple targeting cookie, clientId = efae7440-125b-42bb-a85a-eea85dacd230, target group = , DNS name = arch20302.gp.local 
 2005-10-07    08:33:50    1088    450    PT      Server URL = 
http://router/SimpleAuthWebService/SimpleAuth.asmx  2005-10-07    08:33:52    1088    450    PT    +++++++++++  PT: Synchronizing extended update info  +++++++++++ 
 2005-10-07    08:33:52    1088    450    PT      + ServiceId = {3DA21691-E39D-4DA6-8A4B-B43877BCB1B7}, Server URL = 
http://router/ClientWebService/client.asmx  2005-10-07    08:33:52    1088    450    Agent      * Found 0 updates and 6 categories in search 
 2005-10-07    08:33:52    1088    450    Report    ***********  Report: Initializing static reporting data  *********** 
 2005-10-07    08:33:52    1088    450    Report      * OS Version = 5.1.2600.2.0.65792 
 2005-10-07    08:33:52    1088    450    Report      * Computer Brand = To Be Filled By O.E.M. 
 2005-10-07    08:33:52    1088    450    Report      * Computer Model = To Be Filled By O.E.M. 
 2005-10-07    08:33:52    1088    450    Report      * Bios Revision = 1006.004 
 2005-10-07    08:33:52    1088    450    Report      * Bios Name = BIOS Date: 08/05/04 14:35:59 Ver: 08.00.10 
 2005-10-07    08:33:52    1088    450    Report      * Bios Release Date = 2004-08-05T00:00:00 
 2005-10-07    08:33:52    1088    450    Report      * Locale ID = 1049 
 2005-10-07    08:33:52    1088    450    Agent    ********* 
 2005-10-07    08:33:52    1088    450    Agent    **  END  **  Agent: Finding updates [CallerId = AutomaticUpdates] 
 2005-10-07    08:33:52    1088    450    Agent    ************* 
 2005-10-07    08:33:52    1088    5d4    AU    >>##  RESUMED  ## AU: Search for updates [CallId = {AA591222-C51A-4165-B60A-70BE218679F6}] 
 2005-10-07    08:33:52    1088    5d4    AU      # 0 updates detected 
 2005-10-07    08:33:52    1088    5d4    AU    ######### 
 2005-10-07    08:33:52    1088    5d4    AU    ##  END  ##  AU: Search for updates [CallId = {AA591222-C51A-4165-B60A-70BE218679F6}] 
 2005-10-07    08:33:52    1088    5d4    AU    ############# 
 2005-10-07    08:33:52    1088    5d4    AU    AU setting next detection timeout to 2005-10-07 20:35:21 
 2005-10-07    08:33:57    1088    450    Report    REPORT EVENT: {AEC5D1A2-0331-481F-9653-03AC815DF622}    2005-10-07 08:33:52+0700    1    147    101    {00000000-0000-0000-0000-000000000000}    0    0    AutomaticUpdates    Success    Software Synchronization    Agent has finished detecting items. 
 2005-10-07    08:33:57    1088    450    Report    REPORT EVENT: {3256BD67-65FB-4731-8881-2F1D1AF79858}    2005-10-07 08:33:52+0700    1    153    101    {00000000-0000-0000-0000-000000000000}    0    0    AutomaticUpdates    Success    Pre-Deployment Check    Reporting client status. 
 2005-10-07    08:43:13    1088    450    Report    Uploading 2 events using cached cookie, reporting URL = 
http://router/ReportingWebService/ReportingWebService.asmx  2005-10-07    08:43:13    1088    450    Report    Reporter successfully uploaded 2 events. 
 2005-10-07    13:01:13    1088    78c    AU    Forced install timer expired for scheduled install   
 Судя по логам всё должно быть хорошо. Где ещё посмотреть?