[Solved] How to Fix Game Call of Duty (CoD) Modern Warfare Fatal Error “DEV ERROR 6328”

One of the most common fatal error prompt on Call of Duty Modern Warfare Fatal is “DEV ERROR 6328”, which typically occurs when the start the game or waiting in the Multiplayer lobby. The detailed fatal error message as below:

DEV ERROR 6328
To contact customer service support, go to https://support.activision.com/modernwarfare

Follow the resolution steps on the article to resolve it.

Content Summary

Solution 1: Restart Router and PC
Solution 2: Disable Origin Client Service and Origin Web Helper Service
Solution 3: Install Nvidia Studio driver
Solution 4: Force the game to run in Fullscreen Borderless mode with Sync Every frame (V-Sync)
Solution 5: Clear Battle.net cache

Solution 1: Restart Router and PC

Restart PC Restart and router to flush the DNS and clear any temp data that might be causing the issue. Press the power button to turn it off and wait for 30 seconds or more before press it again to power on the device or simply disconnect the power cable from the power outlet.

Solution 2: Disable Origin Client Service and Origin Web Helper Service

Step 1: Press Windows key + R to open the Run box.

Step 2: Type msconfig and press Enter to open the System configuration window.

Step 3: Select the Services tab from the menu at the top.

Step 4: Check the box associated with Hide all Microsoft services.

Step 5: Uncheck the boxes associated with Origin Client Services and Origin Web Helper Service.

Step 6: Click the Apply button to save the changes.

Step 7: Restart your PC.

Solution 3: Install Nvidia Studio driver

Step 1: Go to the GeForce Experience website.

Step 2: Click on the Download button and wait for the installation executable to download.

Step 3: Double-click the installer to open it and follow the on-screen prompts to complete the installation of GeForce Experience.

Step 4: Sign in with the NVIDIA user account at the initial prompt.

Step 5: Click on the Drivers > Action button (three dots in vertical).

Step 6: Change the driver preference from Game Ready Driver to Studio Driver.

Step 7: Click on the Download button associated with NVIDIA Studio Driver to start the download.

Step 8: Click on Express Installation and follow the on-screen prompts to complete the installation. If the UAC (User Account Control) prompt, click Yes to grant administrative privileges.

Step 9: Restart your PC.

Solution 4: Force the game to run in Fullscreen Borderless mode with Sync Every frame (V-Sync)

Step 1: Start the game Call of Duty Modern Warfare.

Step 2: At the menu screen, click on Settings > Graphics tab.

Step 3: Expand the Display Mode and select Fullscreen Borderless from the drop-down menu.

Step 4: Expand the Sync Every frame (V-Sync) and set it to Enabled.

Step 5: Use the Advanced menu to set the Vsync Frequency to 60hz.

Step 6: Save the changes and then launch a multiplayer game.

Solution 5: Clear Battle.net cache

Step 1: Ensure that any game opened through Battle.net is closed.

Step 2: Press Windows key + R to open Run box.

Step 3: Type %ProgramData% and press Enter to open the ProgramData folder.

Step 4: Go to Blizzard Entertainment > Battle.net > Cache.

Step 5: Press Ctrl + A to select everything inside the folder, then right-click and choose Delete from the context menu.

Step 6: Restart your PC.