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 ...

In this post, we will show you how to change the file type extension on Windows 11/10. Every file on our PC has a file type. For audio files, it might be MP3; for documents, it might be Docx or pdf; ...

When you double-click on a file in Windows XP, the operating system will automatically open the file using a program that has been is associated with the file's extension. It is possible, though, to ...