Excel cannot open file 'file.xlsx' because file format or extension is not valid

Discussion in 'Software' started by Adams_203, Nov 1, 2015.

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  1. Adams_203

    Adams_203 Private E-2

    Every now and then, when I try opening an Excel file, I get a message saying that "Excel cannot open the file 'file.xlsx' because the file format or the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file." Please see attached image
     
  2. Eldon

    Eldon Major Geek Extraordinaire

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