Microsoft Office 2007 and 2010
Microsoft Office 2007 (or 2007 Office System) uses a new XML based file formats and extensions for new documents, workbooks, spreadsheets or presentations that been created by Word 2007, Excel 2007 and PowerPoint 2007. These new file formats (in .docx, .xclx and .pptx extensions) are not backward-compatible, meaning older version of Office suites such as Office 2003, Office XP and Office 2000 cannot open and read the XML files. And by default, Office 2007 will save the document, workbook or presentation as new XML file format, which cannot be immediately opened or viewed or edited by users with earlier version of Office Word, Excel and PowerPoint.
Saving office 2007 and 2010 Documents in the 1997-2003 format
The below directions will show you how to change the default “save as” option to the 1997-2003 format.
Open up Word, Excel or PowerPoint
Click On the File Tab and Select Options
In the Options Menu click on Save. On the right side will be various options for managing your save features.
Within that menu select the 1997-2003 file format from the “Save Files in This Format” Drop Down Menu
Click OK.
Each time that you save a document now your default save type will be 1997-2003

