Fix: Modern Warfare 3 Application Unexpectedly Stopped Working Error

PlayStation users have now been able to play the early access multiplayer beta for Call of Duty: Modern Warfare 3, the next installment in the rebooted Modern Warfare series. Despite its remastered maps and classic features, Modern Warfare 3’s multiplayer may be intimidating to casual players due to its substantial changes to its movement mechanics. However, there are many users who started reporting that they are facing the Modern Warfare 3 Application Unexpectedly Stopped Working Error. That”s why we are here. In this guide, you will learn how to fix it. So, let’s get started with the guide.

Fix: Modern Warfare 3 Application Unexpectedly Stopped Working Error

Fix: Modern Warfare 3 Application Unexpectedly Stopped Working Error

Let’s check out the fixes that will surely help you resolve the Modern Warfare 3 Application Unexpectedly Stopped Working Error:

Fix 1: Restart the PC

It is always a good idea to restart your PC before performing any workarounds, as temporary glitches or cache data can sometimes cause game launching issues. It is recommended that you reboot the system since it doesn’t take that long.

Fix 2: Turn Off G-Sync

It can also be helpful to disable G-Sync if you have a GPU card from Nvidia, as it may conflict with the game’s refresh rate.

  • On your desktop, right-click an empty space.
  • Navigate to the Nvidia Control Panel.
  • In the left pane, click the 3D Settings menu.
  • Choose Manage 3D Settings.
  • Go to the Program Settings tab and click on the Add button.
  • In order to add the game, browse and select the MWIII.exe file.
  • Then click on Specify settings for this program after selecting your game.
  • Select Vertical sync.
  • Set the value of Vertical sync to OFF.
  • Relaunch the game once you have completed this step to see if the error has been resolved.

Fix 3: Run Modern Warfare 3 as an Administrator

In order to ensure compatibility with the system permissions while running the game, run the Modern Warfare III executable as an administrator on the PC.

  • On the PC, navigate to the installation directory for the game.
  • Right-click the COD MWIII.exe file.
  • Go to Properties > Compatibility.
  • To enable this feature, click the Run this program as an administrator as administrator
  • Thereafter, to save the changes, click Apply and then OK.

Fix 4: Check Your Internet Connection


It is also a good idea to check your internet connection on your end to see if it is working properly. There can be a number of issues resulting from slow or unstable network connectivity, including problems with matchmaking or server connectivity.

It is also possible to reduce the data speed if too many devices are connected to the same network. To ensure better stability, use an ethernet connection if you are using Wi-Fi. If that doesn’t work, try using a different connection.

Fix 5: Update COD Modern Warfare III

Please follow the steps below to manually check your PC for Call of Duty Modern Warfare III game updates. There may be several issues with launching the game if the game patch version is outdated.

  • Launch
  • From the Library, select Modern Warfare III.
  • Next to the game, click the cog wheel icon.
  • Then click on Check for Updates.
  • You can install an update if it’s available.


  • Initially, go to the Library in the Steam client.
  • Right-click Modern Warfare III and select Properties.
  • Choose Only update this game when I launch it from Automatic Updates.
  • Launch Modern Warfare II and wait for the download to complete.
  • To auto-update this game before others (if you wish), select High Priority – Always auto-update this game before others.

Fix 6: Turn Off Antivirus Protection

To ensure the game files are not being blocked by antivirus software, you can also turn off Windows Defender antivirus protection on your PC.

  • To open Windows Settings, press Win+I.
  • In the left pane, click Update & Security > Windows Security.
  • Afterward, on the next screen, click Open Windows Security.
  • Navigate to Virus & Threat Protection > Manage Settings.Disable Real-Time Protection (4)
  • After that, you’ll need to turn off Real-time Protection.Disable Real-Time Protection (5)
  • To continue, click on Yes if prompted.

Fix 7: Check for Network Driver Updates

There is also the possibility that your networking driver has become outdated over time, and this is causing the server to not connect. To do this:

  • To open the Quick Link Menu, press Win+X.
  • Go to Device Manager > Double-click the Network adapters icon.
  • Right-click the active network adapter.
  • Choose Update driver > Search automatically for drivers.update network adapter driver
  • Afterward, it will automatically download and install updates if they are available.
  • Restart your computer once the changes have been made.

Fix 8: Close Unnecessary Tasks

It is important to keep in mind that unneeded background programs and tasks consume some of the system’s resources, like the CPU and Memory, reducing the performance of the system. Therefore, startup issues like crashing, lagging, or not loading are quite common. The easiest way to do this is by closing all the unnecessary background tasks running in third-party applications. To do this:

  • In order to open the Task Manager on the PC, press Ctrl+Shift+Esc.
  • Afterward, click on the Processes tab > Select the unnecessary task.
  • To close an unnecessary third-party task, click End Task > Repeat these steps for the other unnecessary tasks.steam end task windows 10
  • To apply the changes, restart your computer.

Fix 9: Run MW3 with DirectX11

If Modern Warfare 3 Unexpectedly Stopped Working Error on Windows occurs, it is likely that there is a conflict with the version of DirectX installed on your computer. It might be worth trying to run the game with DirectX11 via the client to see if the issue persists. To do that:

  • Navigate to the client and select All Games.
  • Go to My Games > Scroll down to Modern Warfare 3.
  • Right-click it and select Options.
  • On the Game Settings page, check the box for Additional command line arguments.
  • Simply type -d3d11 into the box and click Done.
  • Finally, restart the game to see if the issue persists.

Fix 10: Disable Windows Firewall

In a nutshell, the Windows Firewall prevents your PC from connecting to online servers if it is not authorized. To check again for the issue, you can temporarily disable it.

  • To find it, open the Start Menu > Type Windows Firewall.
  • Thereafter, from the search results, select Windows Defender Firewall.
  • Afterward, on the left pane, click on Turn Windows Defender Firewall on or off.
  • After that, you simply need to turn off all the options for Private, Domain, and Public Network Settings.
  • To save your changes, click OK.
  • Disable Windows Firewall

Fix 11: Reinstall COD Modern Warfare III

Following the steps below will allow you to uninstall and reinstall the COD: MW3 game on the gaming device if none of the methods have worked. In some cases, reinstalling the game may be the best option to resolve possible glitches or errors with the game files.


  • Launch the client.
  • From the left panel, select Call of Duty: Modern Warfare III.
  • On the left side, select Options.
  • If prompted, confirm the uninstallation by clicking on Uninstall Game.
  • After the launcher has been closed, reboot your PC.
  • After that, restart and install COD: MW3.
  • Go to the Options menu and select Modify Install.
  • Choose the mode you want to install and click Confirm.
  • Lastly, select Start Install > Wait for it to finish.

For Steam:

  • On your PC, launch the Steam client.
  • In the Library, find COD MWIII and right-click it.
  • To uninstall, select Uninstall > Click on Delete.
  • After the uninstallation process has been completed, exit Steam.
  • Launch File Explorer.
  • To find the location, paste C:/Program Files (x86)/Steam/steamapps/common on the address bar and hit Enter.
  • Go to the COD MW3 folder and delete it completely.
  • Open the Steam Store and reinstall COD MWIII from the Steam Store. Reboot the computer to apply the changes.

So, that’s all we have for you on how to fix the Modern Warfare 3 Application Unexpectedly Stopped Working Error. For those who are experiencing specific issues like getting Multiplayer Not Working or Shaders Optimization Every Time, it’s recommended to click on the provided link to get detailed troubleshooting steps and possible solutions. Always ensure your systems are up-to-date, and be patient as fixes and updates roll out. That’s it, guys. We assume this guide was helpful to you. For further queries, you can comment below.

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