That is a dead link.
Can you please provide a live one? I have a customer in Ethiopia with the same error.
It appears that the knowledgebase has moved as part of a cleanup effort.
What the knowledgebase explained is that error 1603 occurs when the uninstaller is corrupted or incomplete. To fix this issue, you will need to use the Windows Add/Remove window to perform a repair on the software. This will require that you have a copy of the installation files available to perform the repair.
If there are any complications with this let us know by responding to this thread again and we will be happy to help.
Thanks for the quick response on this old thread.
If my customer was following my directions, they were doing a repair operation from Add/Remove programs when they got this message.
They don't have any installation media and apparently can't download the 1 GB installer files from the internet. So I'm actually working on having them ship the computer back here so I can fix it. I have all the DVDs here so I expect I'll be able to figure it out once it's here.
If not, I'll post here with questions.