Fix: COD Modern Warfare Dev Error 6328

The latest Call of Duty release (Modern Warfare) is surrounded by a lot of controversies. The game was riddled with bugs & issues upon its release, and some of them are still wreaking havoc among the PC player base, months after it’s release. One of the most common issues of this kind is Dev Error 6328, which typically occurs when the player attempts to start the game or when waiting in the Multiplayer lobby.

Dev Error 6328

When dealing with this issue, the first fix you should try is to restart your computer along with your router or modem. If that doesn’t work, try disabling the two background Origin services in case you’re launching the game through Origin. On the other hand, if you’re launching the game through Battle.net, clear the cache folder located in ProgramData instead.

In case you’re using an Nvidia GPU, you can try installing the latest Studio driver (some users have reported that this has resolved the issue for them). And in case you are only encountering the Dev Error 6328 when you attempt to join a multiplayer game, try forcing the game to run in borderless mode with VSync on.

Method 1: Restarting Router + Computer

Although this is only a temporary fix, it has worked for a lot of users that we’re desperately wanting to play the game.

Before you start troubleshooting with any of the other fixes below, start simple with a simple PC Restart coupled with a router restart. If the issue is being caused by a network inconsistency, this operation will flush the DNS & clear any temp data that might be causing the issue.

To do a router restart + a power cycle, press the power button on the back once (to turn it OFF) and wait for 30 seconds or more before pressing it again to power the device ON. Additionally, you can simply disconnect the power cable from your power outlet.

reboot router
A demonstration of restarting the router

After you restart both your router/modem and your PC, launch the game again and see if the issue is now resolved.

In case the same issue is still persisting, move down to the next potential fix below.

Method 2: Disabling Origin services

As it turns out, one of the most common culprits that will end up facilitating the apparition of this error is EA’s Game Launcher (Origin).

The vast majority of users reports with the Dev Error 6328 issue encounter this issue when trying to launch the game from Origin. Some users took it upon themselves to troubleshoot the issue and discovered that there are two Origin background services that are suspect of causing this issue.

Upon disabling these two services via msconfig and restarting their computer, some affected users have reported back that the issue is no longer occurring.

If this scenario is applicable and you’re also encountering the Dev Error 6328 when launching COD Modern Warfare from the Origin store, here’s how to disable the two background processes that might cause the problem:

Note: Disabling these two background services will not affect the game in any way, but it will stop your Origin’s ability to auto-update. So even if this fix works for you, re-enable the two services from time to time in order to ensure that you’re running the latest version (or update manually).

  1. Press Windows key + R to open up a Run dialog box. Inside the text box, type ‘msconfig’ and press Enter to open up the System configuration screen.
    Opening System Configuration
  2. Once you’re inside the System Configuration screen, select the Services tab from the menu at the top, then start by checking the box associated with Hide all Microsoft services.
    Clicking on the services tab and unchecking the Hide All Microsoft Services option
  3. After you hide every essential Microsoft service, you will be left with a list of 3rd party services. Click on the Manufacturer column to order the listings based on their publisher.
  4. Once the services are ordered properly, scroll down through the list of services and locate the two associated with Electronic Arts (Origin Client Services and Origin Web Helper Service). After you spot them, uncheck the boxes associated with each of them and click on Apply to save the changes.
    Disabling the two Origin services
  5. After the two services have been disabled, restart your computer and launch COD Modern Warfare at the next startup to see if the issue is now resolved.

In case the same problem is still occurring, move down to the next potential fix below.

Method 3: Installing Nvidia Studio driver

If you’re encountering this issue with an Nvidia GPU, keep in mind that some users have managed to fix the 6328 error entirely by installing the Nvidia Studio driver (from the Gforce Experience app) instead of the regular Game Ready driver.

This supposedly ensures that your GPU driver runs with the latest hotfix for this issue (Infinity Ward has been trying to fix this for months). But the major downside is that Studio drivers are not properly tested and might create additional problems (might not be the case in your situation).

If you decide to try this fix, here’s a quick guide on installing Nvidia Experience and forcing it to download the Studio driver instead of the Game Ready version:

  1. Open your default browser and visit this link (here) to open up the Download Page of Nvidia Experience. Once you’re inside, click on Download now and wait for the installation executable to download.
    Downloading GeForce Experience

    Note: If Gforce Experience is already downloaded, skip this step and the next one.

  2. Once the executable is successfully downloaded, open it and follow the on-screen prompts to complete the installation of GeForce Experience.
  3. Once you’re inside GeForce Experience, sign in with your user account at the initial prompt.
    Sign in with Nvidia Experience
  4. Once you are successfully signed into GeForce Experience, click on Drivers (top-left corner) then click on the Action button in the right section.
    Accessing the action button of Drivers in GeForce Experience
  5. Inside the Action button, change the default driver preference from Game Ready Driver to Studio driver.
    Changing the driver preference mode to Studio Driver
  6. After you do this, the available driver will change. Check to see if the Studio driver is scheduled for download, then click on the Download button associated with it to start the download.
    Downloading the Studio Driver version
  7.  Wait until the download is complete, then click on Express Installation and follow the on-screen prompts to complete the installation.
    Performing an express driver version installation

    Note: If you are prompted by the UAC (User Account Control), click Yes and grant administrative privileges.

  8. Wait until the installation is complete, then restart our computer manually if you’re not automatically prompted to do so and see if the issue is resolved at the next computer startup.

In case the same problem is persisting, move down to the next fix below.

Method 4: Forcing the game to run in borderless mode with VSync

As it turns out, some affected users have managed to fix the Dev Error 6328 by forcing the game to run in Borderless mode with Vsync turned out at 60Hz. This seems like a random setting to use, but there are a lot of users confirming that this particular configuration is the only one that allows them to join multiplayer games without the same fatal crash.

This setting can only be changed in-game, so the fix can only be replicated if you get the error when attempting to join a multiplayer game (not at startup). If this scenario is applicable, here’s a quick guide that will show you how to force the game to run in borderless mode with VSync enabled:

  1. Launch COD Modern warfare and wait until you get to the menu screen. Once you arrive there, click on Settings and select the Graphics tab from the horizontal menu at the top.
  2. Next, expand the Display Mode and select Fullscreen Borderless from the newly appeared drop-down menu.
    Changing the default mode to Fullscreen Borderless
  3. Next, scroll click on the menu associated with Sync Every frame (V-Sync) and set it to Enabled. Next, use the Advanced menu to set the Vsync frequency to 60hz.
  4. Save the modifications and then launch a multiplayer game to see if the Dev Error 6328 has been resolved.

In case you’re still facing the same error or you’re encountering the error code while attempting to launch the game Battle.net, follow the next potential fix below.

Method 5: Clearing the Battle.net cache (if applicable)

If you’re seeing the Dev Error 6328 while attempting to launch the game from Blizzard’s launcher (Battle.Net), it’s likely that you’re dealing with some type of corrupted cache issue.

Several affected users that we’re encountering the same issue have confirmed that they managed to fix the issue indefinitely by navigating to the location of the Blizzard Entertainment folder and delete every file there in order to clear the cache.

If this scenario is applicable to your current situation, here’s a quick guide on clearing the Battle.net cache in order to resolve the Dev Error 6328:

  1. Ensure that Battle.net any game opened through it is closed.
  2. Press Windows key + R to open up a Run dialog box. Next, type ‘%ProgramData%‘ and press Enter to open up the ProgramData folder.
    Accessing the ProgramData folder
  3. Inside the ProgramData folder, access the Blizzard Entertainment folder, then navigate to Battle.net > Cache.
  4. Once you’re inside the Cache folder, select everything inside with Ctrl + A, then right-click on a selected item and choose Delete from the newly appeared context menu.
    Deleting the Cache Folder
  5. Once the entire cache folder has been cleared, restart your computer and see if the issue is resolved at the next system startup.
Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

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Fix: COD Modern Warfare Dev Error 6328

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