Error:Update '{775E218E-0319-4394-971A-FF34AE88E805}' could not be installed. Error code 1642

[Simon]

HI, I have office 2k3 sp2 installed on winXP sp2, when I try to install the
update from web an error occured:

MSI (s) (D4:8C) [08:27:07:279]: Final Patch Application Order:
MSI (s) (D4:8C) [08:27:07:279]: Other Patches:
MSI (s) (D4:8C) [08:27:07:279]: Unknown\Absent:
{775E218E-0319-4394-971A-FF34AE88E805} - C:\Program
Files\OfficeUpdate11\Cabs\512233\512233.OWC11SP2ff.msp
MSI (s) (D4:8C) [08:27:07:279]: Product: Microsoft Office 2003 Web
Components - Update '{775E218E-0319-4394-971A-FF34AE88E805}' could not be
installed. Error code 1642. Additional information is available in the log
file C:\DOCUME~1\<user>\LOCALS~1\Temp\OfficeUpdate\OU(00003)_Msi.log.

MSI (s) (D4:8C) [08:27:07:299]: Product: Microsoft Office 2003 Web
Components -- Installation failed.

The upgrade patch cannot be installed by the Windows Installer service
because the program to be upgraded may be missing, or the upgrade patch may
update a different version of the program. Verify that the program to be
upgraded exists on your computer an
d that you have the correct upgrade patch.
C:\WINDOWS\Installer\1b432bf.msi

Some idea ?

Thanks Simon.