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.

While it is technically possible to open an Excel file in Notepad, this is not a good idea. Excel files are binary files that contain complex formatting and data structures. When you open an Excel ...

If you have an old Excel spreadsheet, Excel opens it in normal view, which might be risky at times when it is downloaded from an unknown source. As many people Unblock the downloaded file without ...

An XLR file is a spreadsheet file from the Microsoft Works software package. Microsoft Works has been discontinued in favor of Microsoft Office so it is not possible to obtain a new and supported copy ...

Q. Help! I have been working on a very important Excel file for a client, and suddenly my computer locked up and says, “Excel is not responding.” Is there anything I can do so that I don’t lose all of ...