I know this is off topic but maybe useful, had some real issues with failed update's on a clean install of Windows XP SP2 after I installed SP3.
Fix for Updates not installing after SP3 on Windows XP error code 0x8007F06B
Start NotePad.exe and type the following:-
net stop wuauserv
regsvr32 wuapi.dll
regsvr32 wuaueng.dll
regsvr32 wuaueng1.dll
regsvr32 wucltui.dll
regsvr32 wups.dll
regsvr32 wups2.dll
regsvr32 wuweb.dll
net start wuauserv
Now save as updatefix.bat. Once saved double click the file to run it and click on OK on any message that appears.
Then go back to the Microsoft update web site and finger's crossed the updates should now work.
scottbelton@tiscali.co.uk