Office files
I don't think you will have any problems either. Many people have used Office 2003 for many years, and 'Word' saved in .doc format, 'Excel' in .xls. When Office 2007 was released, a new format was introduced for MS 'Word' as the default saving format, that is .docx Of course that will not open in Office 2003. The answer is, when working in Office 2007, or 2010, is to 'Save as..Word 97-2003'. That will be fine with Office 2003, 2007 & 2010. Same applies to 'Excel 2007 & 2010' the default is .xlsx, so just 'Save as Excel 97-2003'.(.xls) But note that you won't have the advantages of saving in the new formats, i.e. smaller files saved. But no problems between 2007 & 2010. Hope that makes sense!