I needed to update the Windows Update Agent to get access
- x86-based versions of Windows: Download WindowsUpdateAgent30-x86.exe (http://go.microsoft.com/fwlink/?LinkID=100334).
- x64-based versions of Windows: Download WindowsUpdateAgent30-x64.exe (http://go.microsoft.com/fwlink/?LinkID=100335).
- Itanium-based versions of Windows: Download WindowsUpdateAgent30-ia64.exe (http://go.microsoft.com/fwlink/?LinkID=100336).
In this particular instance, the Client Diagnostic Tool tells us exactly what we need to know. The WUAgent version 5.4.3790.5512 is a very specific build that shipped with the Windows XP Service Pack 3 installation media, and the only known way that this build can get installed is if the scenario described in KB956708 occurs, to wit a fresh XP Service Pack 2 system was immediately updated to Service Pack 3 using media.
The appropriate steps for repairing this issue are provided in the KB article.
The KB Article doesn’t say much – but the fact it seems to happen when upgrading to SP3 direct from SP2 was interesting…
(You’ve left a copy on your NAS in \Shared\SOFTWARE\Operating Systems – Service Packs & Patches – 10th Dec 2015)