Update for Microsoft Outlook Junk Email Filter 2003 (KB949044)

My XP system is running on Office2003 had been trying to do this update for
the last month or so. It kept updating- something it says the update is
installed, other times it says there is an error. Even when it said the
update was sucessful and the system did its updating after closedown, I kept
getting the screen that shows that an update will be perform when I shutdown
the computer.
Can someon please help to sjow how to either complete this update or remove
vestiges of this update totally from my system so that I do not get the
annoying attempts to update as well as to install during shutdown?
Thanks.