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... If you're comfortable with an Office 2002/3 installation, try to avoid Office 2007. As Byron mentioned, Microsoft completely changed the interface for all the Office components, in essence shredding 10+ years accumulated experience in working with Word, Excel, and so on. The native file formats are also incompatible with older versions of Office. It works acceptably well, but it's frustrating and you won't make a lot of friends slinging around .docx and .xlsx files.