This looks a possibility:
You receive an "Error 80070643" error message when you try to update
Office 2003 by using Software Update Services
http://support.microsoft.com/default.aspx/kb/903772
In a similar vein to the previous Article:
If you disable the Ose.exe file, Microsoft Office updates do not install
when you use Microsoft Windows Server Update Services or the Microsoft
Update Web site to deploy software updates and hotfixes to computers in
the organization
http://support.microsoft.com/kb/903774
This one may bog you down
How to troubleshoot Windows Update, Microsoft Update, and Windows Server
Update Services installation issues
http://support.microsoft.com/kb/906602
--
Hope this helps.
Gerry
~~~~
FCA
Stourport, England
Enquire, plan and execute
~~~~~~~~~~~~~~~~~~~