PowerShell is another way on Windows 11 to close all your chosen running apps. To use this method, open Windows Search (press Windows+S), type Notepad, and open the app.

How to Close All Excel Files at Once. When you're working on multiple spreadsheets at a time in Microsoft Excel, closing them all one by one is wasted time you could have spent on another task.

But before you proceed, check if the file or folder you want to delete is in use. Close all open files and folders and try again. Better still, restart your PC and try again.