Tried it too, came up with eror 0x80070643 several times, whatever I tried
of the published solutions didn't do the trick.
(renaming microsoft.public.windowsupdate, the OSE thing, registering some
things, all failed to solve the prob...)
Also Outlook spam filter update gave the same error.
Uninstalled Office, Frontpage, and some weird ".NET" thing (didn't know what
it was to be used for)
Did uninstallation through "add/remove progs", since uninstall through
Office setup didn't finsh.
After reinstall of Office and Frontpage, all updating worked well.
Weird.......