Repair of Excel file

Hi - I have a corrupted Excel file which I can't repair. I wonder would any of you be able to repair it? When you open the file writes that "cannot open the file because the file format or the file extension is invalid. Make sure the file is not corrupted and the file name extension matches the format". It's Excel 2010 . Thanks. (Cannot attach the file because it's .xlsx file)

you can try renaming your file to .zip and see if it opens. an xslx is a zip archive that contains excel data in an xml format

Hi, Thank you for your time and great help. I really appreciate your feedback and I am very thankful for your time and support. Solved!
Many thanks.