Office documents should never be saved to any folder under C:\Program Files\. Those folders are for programs, not user data. Have you tried simply copying/moving the user files from C:\Program Files\ to the user's Documents folder, then opening them from there?
I might also add that the different results you're getting with Office 2013 and Office 2000 suggests you're actually opening different versions of the files.
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Cheers,
Paul Edstein
[Fmr MS MVP - Word]
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