If you’ve tried to open an Excel file and been met with the dreaded extension not valid error, you probably have a corrupt workbook in your hands. It is common to get the common Excel xls and xlsx ...

Microsoft Excel is an important tool for many people in their academic and professional endeavors. One common challenge that users face is encountering the error ...

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 ...

This month's monster security patch for Office breaks Excel when it tries to open HTML files, and it seems unlikely Microsoft will fix the problem Excel users are reporting an odd bug in the way Excel ...