I can find other resolutions than the 3 you mention. Did you try them.
For example:
http://www.tech-archive.net/Archive/Windows/microsoft.public.windowsupdate/2006-09/msg00628.html
http://forums.techarena.in/showthread.php?t=257285
One thing seems rather sure: these machines isn't identical to the other ones. How about a clean install of Windows XP on it to make it identical again?
Kees
I have a machine (XP Pro SP1) that will not accept the upgrade to SP2, with the error code 0x8007F0CC. All the other (identical) machines in the room went fine. I have tried the suggestions on the web:
emptying the browser cache & history
taking Microsoft URLs out of HOSTS files (there were none)
uninstalling certain HOTFIXes
It still won't take the SP2 upgrade.
What else can I try?
Thanks in advance.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic