[SOLVED] 5 Solutions To Fix Fallout 4 Crashes, Errors, Performance Issues: Lag, Low FPS

5 Solutions To Fix Fallout 4 Crashes, Errors, Performance Issues (1)

Fallout 4 is one of the ambitious games released by Bethesda Studios, after launching this game many players reported some issues and errors appearing on the game. Among the lots of issues, one of the general issues is crashing of Fallout 4. Game crashes when a user tries to run or play or the game. Other common Fallout 4 low FPS issues are Lag, Low FPS, and Stuttering.

In this article, you will get the complete guide over the generated issues to make this game error-free.

Issue 1: Crashing of Fallout 4:- Sometimes this game gets crashed when users are trying to run it or you may also face randomly crashes of the game while playing. This is the most common issue and lots of players are affected by this, don’t worry because you can fix it by below-given tutorial.

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Issue 2: Fallout 4 Mouse Acceleration Issue: – This is very irradiating issue in games these days, you can fix it with ease. Simply apply the below-given solution.


  1. Go to:C:\Users\username\Documents\My Games\Fallout4\
  2. Open Fallout4config and changeiPresentInterval=1 to iPresentInterval=0 and do the similar with Fallout4prefs (here also change bForceIgnoreSmoothness=0 change that tobForceIgnoreSmoothness=1)

Issue 3: Fallout 4 Performance Issues: – some players also encounter Performance Issues, some of this issues are Low FPS and Lag.

If you are looking for a fix for the mouse lag use our solution from point 2. If you are looking for a solution to fix the Lag in the game or if you have problems with the FPS follow the tutorial below.

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Fix #1: Check Your Antivirus

The very first you have to do while you get any game error is to check your antivirus. Generally, it happens that the antivirus tools can interfere with the applications and it causes some issue. So, if you are not able to run Fallout 4 on your system then there is a need to check the antivirus as soon as you can.

To fix Fallout 4 game issue, you need to first disable the antivirus and then try to run the game again. Or, if the issue still exists then switch to a different antivirus tool. Some antivirus tools like BullGuard and Bitdefender offers a feature known as Gaming Mode and with this, they will not interfere with the games you are running on your PC.

Also Look: How to Disable Windows Game DVR, Bar and More to boost Gaming Experience on Windows 10?

Fix #2: Update Display Drivers

Before you start playing any game, do not forget to use Display Driver Uninstaller. You can download this from the internet if you don’t have this. After you complete the downloading process, you can start the driver update processes. To do so, you have to:

  • Run DDU so that you can uninstall the display drivers.
  • After completing the uninstallation process you can go to the website of graphics card manufacturer and then download the latest drivers for the graphics card.
  • After completely downloading, you need to install the drivers and then restart the system

After performing these steps, check if the problem is resolved. If not, then try to update your graphics card drivers.

Fix #3: Run The Game In Compatibility Mode

Before starting, it is important to know that you have installed the latest stable drivers and you have downloaded 1.1.30 Beta update.  To do so, you have to follow these steps:

Step 1: First of all, you need to open Steam and then find out Fallout 4. Now right click it and then choose Properties.


Step 2: In the second step, you have to go to Local Files and then Verify Integrity of Game Cache.


Step 3: now you have to go back to Local Files and then click on Browser Local Files.

Step 4: Now you have to search Fallout4.exe and then have to right click it and choose Properties from the given list.


Step 5: After Step 4, you have to go to Compatibility tab and then choose the option “Run this software in compatibility mode” and then select Windows version from the given list. Do not forget that you check the ‘Run As Administrator’ checkbox also. Now, you need to click Apply and then OK just to save the changes you made.


Step 6: In this step, you need to repeat Step 5 for Fallout4Launcher.exe.

Fix #4: Uninstall Raptr software

If you find that you are unable to run Fallout 4 on the Windows 10 system then Raptr software may be the issue. As per the users, this tool can interfere with Fallout 4 and it will prevent from running. But, you can try to fix this game error with the removal of problematic applications.

Several ways are there to perform this job but the best way you can apply is to use uninstaller tool and remove it. Most of the application tends to leave the registry and files entries after removing them.

Fix #5: Change the Fallout4Prefs.ini

Most of the game loving players complain that they cannot run Fallout 4 in fullscreen mode. However, at the same time, the game works great in windowed mode. In order to fix this issue, you have to follow these steps:

Step 1: First of all, open File Explorer and then go to Users\<username>\Documents\My Games\Fallout 4.

Step 2: Now open the file “Fallout4Prefs.ini” with Notepad.

Step 3: After this, you have to find the following variables and then change them to below values:

  • bMaximizeWindow=0
  • bBorderless=1
  • bFull Screen=0
  • iSize H=1080
  • iSize W=1920

Step 4: You should also know that iSize H and iSize W match the screen’s current resolution you are using.

Step 5: Now you have to save the changes and then begin the game.

You can try all these five solutions to fix Fallout 4 Crashes, Errors, Performance Issues: Lag, Low FPS. All these fixes are very effective and they will definitely help you fix Fallout 4 game issue.

Read This: [Solved] How to Fix Game Crashes after Updating to Windows 10 Creators Update?


Using Windows 10 and getting Fallout 4 crashes issue is very a rare error. But, if you get this issue then do not worry, just try to fix Fallout 4 low FPS with help of five solutions mentioned here in this blog. You try fixing this issue by applying the solutions one after another and check if the game error is fixed. Or, if you find that your game error has been fixed but your PC is running slow then you can optimize your PC with PC Repair tool and make your PC run faster.

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[SOLVED] 5 Solutions To Fix Fallout 4 Crashes, Errors, Performance Issues: Lag, Low FPS
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[SOLVED] 5 Solutions To Fix Fallout 4 Crashes, Errors, Performance Issues: Lag, Low FPS
While playing Fallout 4 Windows game, if your game Crashes, and get fallout 4 low FPS issue then follow the steps here to fix this issue with ease.
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