I'm doing some experiment on a virtual box
I installed Xp Pro Sp3 (32bit) OFFLINE.
The I run from my real pc, WSUS 8 Update Generator, against Windows Xp.
I downloaded ALL, than I installed ALL into my (Virtual) Xp OFFLINE
When I turn Xp online, I went to microsoft update, and microsoft update tell me that an update to microsft update itself was required.
Why ?