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I can't open Office 2007 files (.DOCX, .XLSX, etc)

Microsoft Office 2007's file format is different from previous versions of office, however, there are a few options other than buying Office 2007.

First, Microsoft offers a File Format Converter that you can download for free - it seems to work best on Office XP (2002) and Office 2003. Here is a link to it: CLICK HERE

Alternatively, there is a website that has a free conversion tool on it. Just tell them what file, and what format you want it in, and your e-mail address, and they convert it for you, and e-mail it back right away. You can find it here: Zamzar File Conversion