A new ghost of Windows XP was installed on all our computers. It has Office 2003 installed. The old Windows XP also had Office 2003 installed with the Compatibility Pack. Now the Compatibility Pack fails to open Word 2010 DOCX files? The message reads "Word experienced an error trying to open the file. Try these suggestions." None of the suggestions apply. The DOCX file is password protected.

I guess you can try this? Its a Compatibility pack for Microsoft Office Word 2003, Word 2002, or Word 2000:
http://office.microsoft.com/en-us/word-help/open-a-word-2007-document-in-an-earlier-version-of-word-HA010044473.aspx
If that doesn't work, you'll probably have to convert your .docx-files to .doc.
To me, it makes sense that .docx can't be opened in .doc, as it is a newer extension..
But there's probably a way around (see link :) )

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