Hi,
I was working with an excel file and my computer suddenly turned off. When I try to open the file I recieve this message:
Excel cannot open the file because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.
I tried to repair the file but I recived the same message. I also tried to recover previous versions but excel does not allow be to even try to do that.
Please help
