bMaximizeWindow= 0 (If the entry is already 0 then ignore it, else change it to 0).
You now have to edit multiple entries in order to fix the crashes:.
Inside the Fallout 4 folder, lookout for a file titled ‘Fallout4Prefs.ini’ and open it using Notepad.
Note: Before proceeding ahead, make sure that you’re running the latest version of your OS as well as drivers for your graphics card. However, we still come across people who tell us that the number of Fallout 4 crashes on Windows 10 based PCs haven’t decreased significantly.Keeping that in mind, we have penned down a comprehensive guide that will help you fix crashes occurring on Fallout 4, especially when the game is being run on Windows 10 based PCs. These patches also included some new features to keep the gamers interested.
To rectify these crashes, Bethesda released a slew of patches that carried several improvements and bug fixes.