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.

Use the following solutions to get rid of the “Sorry, Excel can’t open two workbooks with the same name at the same time” error message in Excel. To unhide the ...

If you use Microsoft Excel on your Mac, you can save the spreadsheets you create and open them in Numbers, Apple’s spreadsheet app. It’s a handy feature to use in case you can’t access Microsoft’s ...

The troubleshooting guidelines to deal with this problem are explained below. But before you proceed, close all the Excel files and open Excel again. Now, check if you can type something in your Excel ...

Convert OpenOffice.org Calc spreadsheets into a Microsoft Excel file to take advantage of Excel's built-in tools. OpenOffice.org spreadsheets default to a .xsc file extension, which certain versions ...