windows update

hi, I have just installed windows xp media centre, on a freinds dell dimension E520, with the dell disc, installed sp3 etc ok, but last few updates keep failing saying the updates were not installed, it downloads them ok and goes through the process, but then says the updates were not installed, its the last 2 critical and 6 non critical and even one device usb mouse will not, but it gives no reason.

Security Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB936181)
Security Update for Internet Explorer 7 for Windows XP (KB938127)
KYE SYSTEMS CORP. - Input Devices - USB Scroll Mouse

Update for Windows XP (KB951618)


Windows Search 4.0 for Windows XP (KB940157)


Update Rollup for Windows XP Media Center Edition 2005 (KB925766)


Windows Media Player 11 (for Windows Media Center Edition 2005)


Root Certificates Update


Microsoft .NET Framework 2.0: x86 (KB829019)


Windows Messenger 4.7

I have had this same issue with about 5 computers all laptops but don't think it's limited to just laptops. It is apparently due to a few different thing's which all lead to the update manager not working after the install of sp3 because it doesn't register itself once installed. One reason for this is installing SP3 directly after a new install of XP without a reboot. Her is my thread: http://forums.windrivers.com/showthread.php?t=82359

Here is another thread elsewhere: http://forums.techarena.in/windows-update/996779.htm

I have yet to resolve the issue.

Cut and paste ALL of the following into Notepad and save it on your Desktop as WUDFix.bat then double click it.

regsvr32 /s wuapi.dll
regsvr32 /s wuaueng1.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wucltui.dll
regsvr32 /s wups2.dll
regsvr32 /s wups.dll
regsvr32 /s wuweb.dll

rem: http://support.microsoft.com/kb/555989

Yes I have tried this already and it didn't fix the issue. Only way I have found is to remove sp3 and then you also have to do what you suggest here CCT to get it going again with sp2. I think the solution here install all the drivers for your hardware prior to sp3.