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Office 2010 - Compatibility, Compatibility Pack | TechNet
Plan your Office 2010 deployment by evaluating the compatibility of existing hardware, Office documents, add-ins, and line-of-business applications.
Use Office Excel 2010 with earlier versions of Excel - Excel - Office.com
Show All Hide All After you have installed Microsoft Excel 2010, you may want to know how you can continue to work with workbooks that are created in an earlier version of Excel
Excel 2010 file recovery/previous versions failed when needed
Worked on an Excel file all day long, apparently didn't save since 5 hours ago, dragged it to One Note to include in a page, got a long dialog in Excel which I unfortunately chose to disregard, excel
Opening newer excel files in older versions of excel.
I have Excel 2010 on one computer and excel 2007 on another. I am sending files to my mother who has excel 2000. Saving the excel files in older formats is a pain. I remember there being an addon that
Using Older MS Excel Version to open NEWER Excel files?
I am having problems using newer MS Excel files .xlxs file types on desktop which is using MS Excel Office 2002 version. What Patch do I need?