Reset File Explorer Navigation Pane Width to Default contains the registry files to restore the File Explorer Navigation Pane to the default width. You can also do this by deleting a registry key, as explained in our tutorial.
Windows File Explorer has many features and options, including the ability to size the window and navigation pane to any size you need. What it lacks is an option to set the File Explorer width to the default size. Until now.
Download Reset File Explorer Navigation Pane Width to Default and extract Reset Navigation Pane Width to Default.reg.
Double-click Reset Navigation Pane Width to Default.reg.
Click Yes when prompted by User Account Control. Click Yes when prompted by Registry Editor.