If you're re-saving an existing Excel document, navigate to its location on your computer and open it. Launch the save file window.

How to Open an XLS File in Excel. 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 ...

Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.

The Online Tech Tips blog explains how to use a registry hack to add an "Open in New Excel Instance" item to your context menu—which will open your spreadsheet in a separate copy of Excel, so ...