When you first installed Microsoft Excel, it should have registered itself as the default program for opening compatible file types, such as .xlsx or .xls. Installing other spreadsheet programs may ...

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 ...

I used to think the "Save as type" drop-down menu in Excel was just a list of legacy junk. I was wrong. It's actually a toolkit of superpowers that can shrink massive workbooks, turn macros into ...