yarg...tried one update but it failed to install again, the error report is as follows:
* Updates to install = 1
2008-04-26 15:30:07:765 1368 a04 Agent * Title = Root Certificates Update
2008-04-26 15:30:07:765 1368 a04 Agent * UpdateId = {D24FE7DE-266B-4260-BBF2-59824AF246CF}.101
2008-04-26 15:30:07:765 1368 a04 Agent * Bundles 1 updates:
2008-04-26 15:30:07:765 1368 a04 Agent * {C1292657-6E08-4BD7-A3E6-8725BB43B40C}.101
2008-04-26 15:30:12:000 1368 a04 Handler Attempting to create remote handler process as HOME-D923F24026\starkers in session 0
2008-04-26 15:30:12:171 3804 628 Misc =========== Logging initialized (build: 7.0.6000.381, tz: +1000) ===========
2008-04-26 15:30:12:171 3804 628 Misc = Process: C:\WINDOWS\system32\wuauclt.exe
2008-04-26 15:30:12:171 3804 628 AUClnt FATAL: Error: 0x80004002. wuauclt handler: failed to spawn COM server
2008-04-26 15:30:12:187 1368 a04 Handler FATAL: 0x80004002: ERROR: Remote update handler container process created (PID: 3804), but exited before signaling event
2008-04-26 15:30:12:187 1368 a04 Agent * WARNING: Exit code = 0x80004002
2008-04-26 15:30:12:187 1368 a04 Agent *********
2008-04-26 15:30:12:187 1368 a04 Agent ** END ** Agent: Installing updates [CallerId = MicrosoftUpdate]
2008-04-26 15:30:12:187 1368 a04 Agent *************
2008-04-26 15:30:12:187 1368 a04 Agent WARNING: WU client failed installing updates with error 0x80004002
2008-04-26 15:30:12:187 2812 e5c COMAPI >>-- RESUMED -- COMAPI: Install [ClientId = MicrosoftUpdate]
2008-04-26 15:30:12:187 2812 e5c COMAPI - Install call failed
2008-04-26 15:30:12:187 2812 e5c COMAPI - Reboot required = No
2008-04-26 15:30:12:187 2812 e5c COMAPI - WARNING: Exit code = 0x80240FFF; Call error code = 0x80004002
2008-04-26 15:30:12:187 2812 e5c COMAPI ---------
2008-04-26 15:30:12:187 2812 e5c COMAPI -- END -- COMAPI: Install [ClientId = MicrosoftUpdate]
2008-04-26 15:30:12:187 2812 e5c COMAPI -------------
2008-04-26 15:30:12:250 1368 460 Report REPORT EVENT: {5F68AF90-0CD7-424E-BF68-229CA10803F6} 2008-04-26 15:30:07:250+1000 1 162 101 {D24FE7DE-266B-4260-BBF2-59824AF246CF} 101 0 MicrosoftUpdate Success Content Download Download succeeded.
2008-04-26 15:30:12:937 2812 ecc COMAPI WARNING: Operation failed due to earlier error, hr=80004002
Hope that helps find a fix... cos it's all Greek to me.