> "april" <april[ at ]123.com> wrote in message
> news:%23RbRqw%23TJHA.588[ at ]TK2MSFTNGP06.phx.gbl...
>> I have one test xpsp2 machine used to test Windows updates. I did a
>> manual installing of sp3 on this test xp machine. After that, I
>> uninstalled sp3 and it goes back to sp2. Now this machine can not
>> detect sp3 from WSUS. What happened?
>>
>> Can someone advise on this?
>
> A key question here is whether it's only =SP3= that cannot be detected,
> or whether the client system cannot detect any updates at all.
>
> Start with KB943144, which may be your issue in this case:
>
http://support.microsoft.com/kb/943144>
> "This problem occurs when the latest Windows Update client has been
> installed and then you install Windows XP SP3 before restarting the
> computer. This causes the new Wups2.dll file not to be enabled
> (registered). When Windows XP SP3 is installed, it does not detect the
> Wups2.dll file, and it sets the registry to point to the original
> Wups.dll file version that is included in Windows XP SP2 and Windows XP
> SP3. Because the registry files that correspond to the Wups2.dll file
> are missing, update installations are unsuccessful."
>
> The above could occur in a WSUS environment, where the XP SP2 system
> executes a detection, updates the WUA, finds no approved updates (thus
> performs no restart), and then has Service Pack 3 installed.
> Uninstalling SP3 would not change the registration of the WUA
> components, and the wups2.dll file would remain unregistered.
>
>
> To resolve this issue, run these commands from the command line:
>
> net stop wuauserv
> regsvr32 %windir%\system32\wups2.dll
> net start wuauserv
>
> For a machine running the x64 edition, use
> regsrv32 %windir%\syswow64\wups2.dll
>
>
That machine did detect any other updates except xp sp3. I rebooted the