Do you have some Office related updates from Windows Update that just won’t install? Check your system log and see if it’s error 0x80070643.

This cryptic message is Window’s way of telling you it needs the installation source media. This happens if you choose to remove the installation temp files at the end of the Office 2003 installer. Just put the CD or DVD in your drive and run the updates again. They will now properly apply and you can get rid of that annoying yellow update notification in your task bar.