Right-click the Fallout 4, and click on Properties from the list of options. Your Library consists of all the different games which are installed in your PC.Browse to the Library tab (click the name Library present at the top of the screen). There are several cases where Steam doesn’t download complete game files on your computer. According to users, their file bank wasn’t complete because of some reason and this caused the game not to launch properly. The first thing you should do is verify the integrity of game files on your computer. Solution 1: Verifying integrity of game files The restarting is known to solve the issue.
Note: Before proceeding, restart your computer properly and relaunch your Steam client (around ~3 times) before moving on.
