If Microsoft Excel fails to recognize a file in the XLSX or XLS format, the data contained in the file could be corrupted. When you open a corrupted workbook in Excel, the program should automatically ...

XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.

Sometimes, Excel Online may not work as expected and won’t open files. In such cases, you may get error messages, such as ‘Couldn’t Open the Workbook‘, or ...

Some MS Excel users reported Excel is not opening on double-click on their Windows computers, and some other users reported that Excel would open normally but the Excel file would not open. These ...