How To Fix Dev Error 6328 on COD Modern Warfare

Modern Warfare is the latest release of Call of Duty. Unfortunately there were a lot of bugs and other problems on its release, which are still causing problems now months afterward. Dev Error 6328 seems to be one of the most common problems and this happens when you wait in the multiplayer lobby or try to start the game.

The first thing to try is restarting your PC and modem or router. If that is not successful, disable the two Origin services in the background (if you are launching the game through them).

If you use instead of Origin, clear the cache folder found in the program data. Are you using an Nvidia GPU? If so, try to install the newest Studio driver. If you only get the error when trying to join a multiplayer game then try to make the game run borderless with VSync on.

Dev Error 6328 - Modern Warfare

5 Ways To Fix Dev Error 6328 (Modern Warfare)

Let’s take a more in-depth look at these fixes for Dev Error 6328:

1) Restart PC and Router

This might only be a temporary fix but if the error is being caused by a network issue, it will clear the DNS and temp data which might resolve it.

  1. Press the power button on the back of your router, wait 30 seconds, then turn it back on.
  2. Alternatively simple pull out the plug, wait and then put it back in the socket.
  3. Restart your PC.

Now see if the game plays normally without the error.

2) Disable Origin Services

Origin is EA’s game launcher and a lot of people experiencing Dev Error 6328 get the problem when launching the game using Origin. Disabling the two problematic Origin services won’t affect gameplay but it does mean Origin won’t auto-update.

Dev Error 6328 COD Modern Warfare - Disable OC Service
  1. Press the Windows logo key and R, then type: msconfig in the box and hit enter.
  2. Now choose the services tab and check the ‘hide all Microsoft services’ box. With those hidden you can only see third party services.
  3. Click on the manufacturer column to put those in A to Z order, then find the two services associated with EA (Electronic Arts), namely Origin client services and Origin web helper service.
  4. Uncheck the boxes next to those two, and click on apply.
  5. Restart the PC and launch the game to see whether the issue is fixed.

3) Force Borderless Mode with VSync

A lot of players say this fix worked for them, despite it seeming a little random. You can only do this in the game, not at startup, so try it if your game loads.

Dev Error 6328 Modern Warfare - Force Borderless Mode
  1. Launch COD Modern Warfare.
  2. On the menu screen click settings and choose the graphics tab.
  3. Expand the display mode and choose full screen borderless from the drop down menu.
  4. Scroll click on the V-Sync (sync every frame) menu and enable it.
  5. Set the VSync frequency to 60hz using the advanced menu.
  6. Save then launch a multiplayer game to see whether the Dev Error 6328 continues.

4) Install the Nvidia Studio Driver

Using Gforce Experience’s Nvidia Studio driver instead of the regular Game Ready driver might be able to fix the issue.


It is supposed to make sure your GPU is running with the newest hotfix. However, Studio drivers are not tested properly and might give you more problems.

If you want to try this anyway, head here and:

  1. Click on download.
  2. Open it and follow the prompts on the screen to complete the installation, and then sign in with your user account.
  3. Click on drivers in the top left hand corner then click on action on the right.
  4. Now change the default driver preference to Studio driver.
  5. See whether the Studio driver is scheduled to be downloaded then click on download.
  6. When this is complete, click on express installation and follow the instructions on-screen.
  7. You might get a prompt from user account control; if so, just click yes to get administrative privileges.
  8. After the installation has finished, restart your PC.

Also read: How To Fix Dev Error 6068 on Modern Warfare

5) Clear the Cache

If you are launching the game from, Blizzard’s launcher, instead of Origin, your cache might be corrupted.

Dev Error 6328 Modern Warfare - Clear Cache

Go to the Blizzard entertainment folder and delete all the files in the cache.

  1. Make sure the game is closed, then press the Windows logo key and R.
  2. Type: %ProgramData% then press enter.
  3. Now access the Blizzard entertainment folder, go to and go to cache.
  4. From there, simply press Ctrl and A to highlight everything and select delete from the popup menu.
  5. Wait for it all to delete, then restart your PC and see if that has solved the Dev Error 6328 issue.

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