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.

If hyperlinks are not opening or working properly in Microsoft Excel, ensure that the target file is not changed and follow these fixes.

Also, if you're using multiple versions of Excel on the same computer, the default program for opening your files may be a different version of Excel than you'd prefer to use.

A number of people are having difficulties opening some Excel spreadsheets in Office 2004 after this week's update.