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.

There are ways to re-set or establish associations between file and program in Windows 10.

How to Open Excel Sheets in Separate Windows. Whether you use Microsoft Excel to help run your invoicing, sales tracking, returns or payment divisions, spreadsheet software may be a daily ...

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 ...