Can't open .xlsx file in excel 2007

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,
I've created a file in excel 2007 with extension(.xlsx) several days ago. i
was able to open and save the file then. However, when i tried opening this
file yesterday, it prompts me this error message: Excel cannot open the file
'2007.xlsx' because the file format or file extension is not valid".
Therefore, i was not able to open this file.

This shouldn't have happen as i've tried creating and save another document
in excel 2007. The file extension was also .xlsx and i can opened the
document.

Please advise what can i do to retrieve back my file. It is a very important
file.

Thanks,
amylim
 
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