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.

Upgrade to XLSX for smaller file sizes, enhanced security, modern collaboration features, and to prevent accidental data loss ...

Spreadsheets: love them or hate them, they are a part of modern-day life and Microsoft’s Excel software is the go-to for most users spreadsheet needs. But what happens when you want to edit a ...

When Microsoft rolled out Office 2007, the company made some fundamental changes to its file formats, updating them from binary files to XML-based packages. The default format for Excel 2007 followed ...

Stop using fragile direct links—Power Query creates faster, automated, and more robust workbook connections.

I have a password protected xlsx file that somehow became corrupt. <BR><BR>I've tried the automatic repair feature in office 2010 with no luck. I've also tried various excel recovery programs that ...

If you notice that your Excel files are opening in Notepad, then read this post to learn how to fix the issue. The default behavior of a document or file is to open in the application with which it ...