It is a nice and clean site - no nasties or costs. Windows 7 can be found on ebay for as little as 15 and is compatible with Office 2003 and Office 2010. If you are good at reading 'specialist instructions', you might be interested in the article at the following URL\ Leo, regarding the question about Office 2003 on a Windows 10 computer, I have found that Office 2007 works fine with Windows 10. Mind you, this is a good excuse to go out and treat yourself to a new quad-core PC with the latest bells and whistles. I have not been able to find a way around it except to install the 2007 version of Office - and most people hate 2007 Word once they have been working for years with 2003 Word.
This is something I have come across quite a few times when I have been rebuilding PC's on upgrades from XP to Vista - mostly, the Office 2003 goes in without a problem - other times, it just wont work and you get incompatability warnings. No, I don't think you are doing anything wrong when you try to put your MS Office 2003 Pro suite back.