How to

Fix Unreal Engine Exiting Due To D3D Device Being Lost

Unreal Engine Exiting
Written by Kelly Houstan

Users basically experience the error message ‘Unreal Engine is exiting due to D3D device being lost’. Whenever Unreal is unable to connect along with the D3D device on your computer. This error is really common and can also occur for users who have no apparent issues on their computers actually. In this article, we are going to talk about Fix Unreal Engine Exiting Due To D3D Device Being Lost. Let’s begin!

According to Unreal Engine developers, this issue mostly occurs whenever the computer’s graphics or also hardware components are not properly synchronize along with Unreal Engine. That in turn causes it not to work properly with the D3D devices.

Fix Unreal Engine exiting due to D3D device being lost error

The Unreal Engine Exiting due to D3D device being lost error can be really persistent and annoying and has been reported to occur in a lot of games that are powered via Unreal Engine. Such errors occur mostly, because of system and game settings that your device is unable to support. This so happens as gamers tend to push the Central Processing Unit (CPU) and Graphics Processing Unit (GPU) to their maximum levels actually. Overclocking of CPU enhances game performance but leads to a lot of errors as well, also including this one.

Tun off Game Boost Settings

Many new features, such as Game Booster, are adding to the latest Graphics card drivers in order to make the game run smoothly, without even glitches. But, these settings also cause issues, just like the Unreal Engine Exiting error and D3D device error.

Note: The images we are using here pertain to AMD graphics settings as well. You can implement the same steps for NVIDIA graphics.

  • Open AMD Radeon Software settings via right-clicking on the Desktop.
  • Choose the Gaming Option located at the top of the AMD window, as shown.
  • Now, choose the game which is causing you trouble. It will be visible in the Gaming window. In our case, no games are download yet actually.
  • Now under the Graphics tab, click Radeon Boost.
  • Disable it via toggling off the Radeon Boost option as well.

Disable in-built Graphics

If changing the preference of the graphics card couldn’t fix Unreal Engine exiting due to the D3D device being lost in error. And then it might be a good idea to temporarily turn off the in-built graphics card. This will prevent conflict issues between the two graphics cards, altogether.

Note: Disabling in-built graphics will actually have no effect on the functioning of your computer.

Follow these steps to turn off in-built graphics card in Windows 10 PC:

  •  Open Device Manager via typing the same in the Windows search bar, as shown.
  • Double-tap on Display adapters, as highlighted, in order to expand it.
  • Right-tap on the in-built Display Adapter and select Disable device.
  • Restart your system and enjoy playing the game as well.

Change Prefered Graphics Card
Nowadays, hardcore gamers use external graphics cards on their desktops in order to achieve an enhanced gaming experience. These graphics cards are added externally to the CPU. But, if you utilize the in-built and external graphics drivers simultaneously. This can actually cause conflict within the computer and result in the Unreal Engine Exiting due to the D3D device error. Hence, we recommend you in order to run your games using a graphics card only.

Note: As an example, we are now enabling the NVIDIA Graphics card and disabling the default graphics driver.

  • Choose the NVIDIA Control Panel via right-clicking on the desktop.
  • Tap on Manage 3D Settings from the left pane and then switch to the Program Settings tab in the right pane.
  • In Select a program to customize the drop-down menu, you have to choose Unreal Engine.
  • From the second drop-down titled choose the preferred graphics processor for this program, then select High-performance NVIDIA Processor, as highlighted.

Unreal Engine Exiting

  • Tap on Apply and exit.

Restart your PC and attempt to run the module/game in order to confirm that Unreal Engine exiting due to D3D device being lost error is fixed.

Disable Windows Firewall & Antivirus Program

Antivirus software has also proven to be a boon when it comes in order to protect PCs from malware and trojans. Just like that, Windows Defender Firewall is actually the built-in protection offered on Windows systems. But, in some cases, the Antivirus or Firewall might mistakenly perceive a verified program like malware and block its operations; more often, the high resource-consuming applications actually. This might also causing Unreal Engine exiting due to the D3D device error. Hence, disabling them should help.

Note: You can turn off these applications when playing your games. Keep in mind to turn them back on, thereafter.

Just follow these steps to turn off Windows Defender Firewall:

  • First, type Windows Defender Firewall in the search box and open it as shown.
  • Tap on the Turn Windows Defender Firewall on or off option located in the left pane.
  • Now check the option marked Turn off Windows Defender Firewall (not recommended).
  • Do so for all types of Network Settings and then tap on OK. This will turn the firewall off.

Implement the same steps and search for the same options to disable third-party Antivirus programs installed on your system. It is recommended to uninstall the third-party antivirus if it is creating issues along with multiple programs.

Disable in-game Full-screen Mode

Some games also face troubles operating when the Full-screen mode is actually turned on. No matter what you do, the game just won’t run in this mode actually. In such cases, you should try to run the game in a Windowed mode. You can do this easily through the in-game settings. Many of the recently launched games come along with these settings. Disable in-game Full-screen mode and also verify if this could fix Unreal Engine Exiting due to D3D device error.

Turn off Overclocking and SLI Technology

Overclocking is a really great game enhancement feature and can really push your graphics card and CPU. In order to perform at the maximum possible levels. But, some games such as Unreal engine are just not suite to run in such overclock environments. These kinds of settings can result in Unreal Engine Exiting and D3D device errors. Thus, Disable the overclocking software that you have installed on your computer and try to run the game to see if it resolves the issue.

Also, if you guys are using SLI or Scalable Link Interface for your graphics cards. Then you have to disable it too. The technology was develop via NVIDIA in order to utilize both default and dedicate graphics cards together for gameplay. Yet, there have many reports of the Unreal engine not working properly actually whenever SLI was enable. Using a dedicated graphics card should work just fine. Here’s how you can do so:

  • Just open NVIDIA Control Panel via right-clicking on an empty space on the Desktop.
  • Double-tap on the 3D Settings option from the left panel and then, then tap on Configure SLI, Surround, PhysX option.
  • Check the box next to Disable SLI under SLI configuration, when highlighted in the pic below.

Unreal Engine Exiting

  • Tap on Apply and exit.
  • Reboot your system in order to implement these changes and then open the game.

Verify Integrity of Game Files on Steam

If you guys prefer to play online games via Steam, you can also make use of this amazing feature offered via this famous gaming platform. Using this tool, you will be able to rectify issues related in order to corrupt or missing game files, if any, and enjoy smooth gameplay as well.


Does updating drivers increase FPS?

Yes, updating the installed drivers can also increase FPS i.e. Frames Per Second considerably. In few instances, the frame rates have actually know to increase via up to fifty percent. Not only that, however, updating drivers also smoothens the game experience via freeing up glitches.

What causes the D3D device to lost error?

According to the creators of Unreal Engine, this issue typically happens whenever the computer graphics or hardware components are not sync along with Unreal Engine correctly. This causes it to fail in order to operate with D3D devices.


Well, That is all from my side. If you want to know more about this article or have any queries. Then feel free to ask me anything in the comments section below.

Have a Good Day!

About the author

Kelly Houstan

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