When you working with excel file during some days, after you save it and everything it is ok. But after you opened MS Excel 2013 and you saw: This file is not in a recognizable format. It is my case, and I need help with repair Excel files.
I like to do what I like
I Googled your issue and found THESE INSTRUCTIONS. I know you have to open Excel without opening the file first to help with recovery. If the file cannot be repaired but can be opened, then I would copy everything from the Excedl file, then paste it to a new Excel file.
Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks
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#MicrosoftMVP - Windows Expert-Consumer April 1, 2012 to March 31, 2015