If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.

Typically, when you open a corrupt workbook, Excel automatically attempts to repair it and displays a dialog box offering the option to either repair the file or extract data from it.

If Task Scheduler is not opening an Excel file on your Windows PC, ensure the task is set to run only when user is logged on, or use these fixes.