Microsoft KB articles are nice, but I'm sure you want a concrete suggestion:
Try right clicking on Computer (or even for XP, right click My Computer) and
select Manage, then to Servics and Applications, then to Services, scroll
down to Office Source Engine and right click and select Start, then retry.
If that doesn't work, try deleting the contents of
c:\windows\softwaredistribution and restart and then try again.
If that doesn't work, try installing the udates individually (i.e. in the
windows update window, look for the KB number that failed and go to
and look for a link for IT
Professionals, which should have a link to the "component" you are looking
for; i.e. look for a link next to the KBnumberhere)--then restart and retry
windows update (which may not have any updates, but then you know you jumped