: You can often find a template file named Fallout_default.ini (or similar) in your main game installation folder. You can copy this to your Documents\My Games\Fallout... folder and rename it to FalloutPrefs.ini as a last resort. Common Locations
If your file is missing or corrupted, use these official methods to get a fresh copy: skachat fail falloutprefs ini
The file is almost always located in your user profile, separate from the main installation folder: : You can often find a template file named Fallout_default
The FalloutPrefs.ini file is a critical configuration file used by Fallout games (such as Fallout 3, New Vegas, and Fallout 4) to store your specific graphical, audio, and gameplay settings. and gameplay settings.