I've been trying to sort this out for a matter of weeks now... it started when Office would not open. I tried to reinstall the software but got an error message saying 'the patch package could not be opened'. However the CD seems to work OK as I have since installed it onto a different computer. I am now trying to roll back the XP system in the hope that I can get the software working again. Sadly, Microsoft does not have much interest in supporting XP and Office 2003!
How to get Windows 10 now: how to download and install Windows 10 even if GWX.exe is missing