I had deleted some of my important .xlsx files accidentally. Finally, I recovered these files withe help of "Recuva". But while trying to open any of these files, file is not opening and showing a message as Excel cannot open the file 'abc.xlsx' because the file format or file extension is not valid.
I tried to open these files with excel "Open & Repoair" option but no luck found.
I am using Windows8-64. Can anybody help me.