How To Fix Modern Warfare 3 (MW3) Dev Error 12744

How To Fix Modern Warfare 3 MW3 Dev Error 12744 1

Are you struggling to overcome the frustrating Modern Warfare 3 (MW3) Dev Error 12744, hindering your gaming experience? Don’t worry, we’ve got you covered.

Fortunately, there are several effective methods for addressing this error and getting back to enjoying your MW3 experience.

In this blog, we’ll explore proven strategies to fix Dev Error 12744 in MW3, drawing from both expert insights and community experiences. 

How To Fix Modern Warfare 3 (MW3) Dev Error 12744?

How To Fix Modern Warfare 3 MW3 Dev Error 12744

To fix Modern Warfare 3 (MW3) dev error 12744 you can update the game, verify game files, update graphics drivers. Additionally, you can disable overlay applications, run the game as an administrator, and check for windows updates.

1. Update Modern Warfare 3

Game developers regularly release updates to fix bugs and improve performance. Ensuring you have the latest version of the game can eliminate known issues.

  • Launch the game client (Steam,
  • If there’s an update available, the client will typically prompt you to update the game. Follow the on-screen instructions to complete the update process.

2. Verify Modern Warfare 3 Game Files

Corrupted or missing game files can often cause errors. Verifying the integrity of your game files can help ensure that all necessary files are in place and in good condition.

For Steam:

  • Open Steam
  • Go to your Library.
  • Right-click on ‘Call of Duty: Modern Warfare 3
  • select ‘Properties‘.
  • Click on the ‘Local Files‘ tab.
  • Click ‘Verify integrity of game files‘ button and wait for the process to complete


  • Open the client.
  • Click on the ‘Games‘ tab
  • Select ‘Call of Duty: MW3‘ from the list.
  • Click on the cogwheel next to the ‘Play‘ button.
  • Select ‘Scan and Repair‘ from the dropdown menu.
  • Click ‘Begin Scan‘ and wait for the process to complete.

3. Update Graphics Drivers

Outdated graphics drivers can lead to performance issues and errors. Keeping your drivers up to date ensures compatibility and can often resolve errors.

  • Right-click on the desktop.
  • Select “Device Manager.
  • Expand “Display adapters” to see your graphics card.
  • Right-click on the graphics card.
  • Select “Update driver.
  • Choose “Search automatically for updated driver software.
  • If an update is found, follow the prompts to install it.
  • Restart your computer after the installation is complete.

4. Disable Overlay Applications

Overlay applications can sometimes interfere with game processes, causing errors. Disabling these can help resolve Dev Error 12744 by removing any conflicts between the game and third-party software.

  • Close any overlay applications like Discord, NVIDIA GeForce Experience, or game recorders.
  • You can usually disable overlays in the settings menu of these applications.
  • After disabling, restart Modern Warfare 3 to check if the error is resolved.

5. Run Modern Warfare 3 As An Administrator

Running the game with administrator privileges can resolve issues related to permissions, allowing the game to access necessary system resources.

  • Navigate to the installation folder of MW3.
  • Right-click on the ‘MW3.exe‘ file.
  • Select ‘Properties‘ > ‘Compatibility‘ tab.
  • Check ‘Run this program as an administrator‘.
  • Click ‘Apply‘ and then ‘OK‘.

6. Check For Windows Updates

Operating system updates can include important fixes and improvements that can help resolve compatibility issues with games.

  • Click on the Start menu.
  • Select ‘Settings‘.
  • Go to ‘Update & Security‘.
  • Click on ‘Windows Update‘.
  • Click ‘Check for updates‘ and install any available updates

7. Check For System Compatibility

If your system does not meet the minimum requirements for the game, you may experience errors. Ensuring compatibility can help avoid these issues.
Compare your PC’s hardware with the minimum system requirements listed for MW3.

  • Locate the minimum system requirements for MW3 (usually found on the game’s website or store page).
  • Open DirectX Diagnostic Tool with Windows Key + R, type dxdiag, hit Enter.
  • Compare your PC specs from “System” and “Display” tabs to the game’s requirements.
  • Upgrade hardware if necessary to meet the minimum specs.

8. Uninstall And Reinstall Modern Warfare 3

A fresh reinstall can fix errors that occur due to corrupt installations or updates that did not install correctly.

For PC (Steam):

  • Open Steam.
  • Go to the Library.
  • Right-click on ‘Call of Duty: Modern Warfare 3‘.
  • Select ‘Uninstall‘ and confirm.
  • After uninstallation, restart your PC.
  • Return to Steam Library.
  • Click on ‘Call of Duty: Modern Warfare 3‘.
  • Select ‘Install‘ and follow the prompts.

For PC (

  • Open the client.
  • Click on the MW3 icon.
  • Click the gear icon and select ‘Uninstall‘.
  • Confirm the uninstallation.
  • Restart your PC.
  • Open again.
  • Click on the MW3 icon and select ‘Install‘.

9. Reach Out For Activision Support

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If all else fails, seeking help from the game’s support team or community forums can provide you with more targeted assistance for your specific error