The Windows "Open With" dialog box will help you quickly reassign a default program for your Excel documents.

How to Open Excel 2007 Files As Separate Windows. If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can ...

If you cannot open Microsoft Office program files, you can start Word, Excel, PowerPoint, Outlook, Publisher, Viso, etc, in Safe Mode in Windows 11/10.

The Online Tech Tips blog explains how to use a registry hack to add an "Open in New Excel Instance" item to your context menu—which will open your spreadsheet in a separate copy of Excel, so ...