Add the Undo Button to Windows 8.1's File Explorer
You can add a button to File Explorer in Windows 8.1 to undo just about any action, such as moving, renaming, or deleting a file.
Above the Home tab, select the rather small down-pointing arrow to display the Customize Quick Access Toolbar list.
Select the Undo option from the drop-down list.
The Undo button, which sports a blue arrow curving to the left, appears immediately to the left of the arrow you clicked in Step 1. You can undo most — but not all — actions in File Explorer by clicking or tapping this button immediately after the action. (Time isn’t the issue. You can do something, and then undo it a year later if you don’t do anything in the meantime.)
The keyboard shortcut for undo is Ctrl+Z. This shortcut works regardless of whether the Undo button is on the screen.
You may be able to undo a series of actions by repeating the undo function.
Select the Customize Quick Access Toolbar button again.
Note that you can also add the Redo button, which, as you would expect, undoes the undo. All the other options appear also on larger buttons on the Home tab, so you don’t need to add them to the Quick Access toolbar.