Hello. I have had trouble opening an Excel File. If you know that the file is corrupted, there is no possibility of extracting the data contained in the sheet File format or file type is invalid With best regards Geir
I right clicked on the file, opened properties, and saw that the the file being downloaded from an email had been blocked by the computer as beng "unsafe". I just clicked unblock and I was finally able to open the spreadsheet. Took me a day to find this.