[Solved] Steam Fallout 4 doesn’t Launch after Clicked

Problem: Fallout 4 doesn’t launch when clicked.

Content Summary

Solution 1: Verifying integrity of game files
Solution 2: Running in compatibility mode
Solution 3: Disabling Antivirus Software
Solution 4: Launching in Windowed Borderless mode
Solution 5: Removing all mods
Solution 6: Updating/rolling back Graphics drivers

Solution 1: Verifying integrity of game files

Step 1: Start Steam client.

Step 2: Go to Library tab.

Step 3: Right-click Fallout 4 and click on Properties.

Step 4: Navigate to Local Files tab and click on Verify Integrity of Game Files button. Steam will start to compare the manifests and verify the integrity of your game.

Step 5: Restart Steam after the process completed.

Solution 2: Running in compatibility mode

Step 1: Start Steam client.

Step 2: Go to Library tab.

Step 3: Right-click Fallout 4 and click on Properties.

Step 4: Click on Local files tab > Browse local files.

Step 5: Locate the game file fallout4.exe, right-click it and select Properties.

Step 6: Go to Compatibility tab and check the option Run this program in compatibility mode for: and select Windows 8. Also check the box Run this program as an administrator.

Step 7: Press Apply to save changes and exit.

Solution 3: Disabling Antivirus Software

Solution 4: Launching in Windowed Borderless mode

Step 1: Start Steam client.

Step 2: Go to Library tab.

Step 3: Right-click Fallout 4 and click on Properties.

Step 4: Go to General tab > Set launch options to -windowed -noborder. Press OK to save changes and exit.

Step 5: Restart computer.

Solution 5: Removing all mods

Solution 6: Updating/rolling back Graphics drivers