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How to fix MW2 dev error 657? 

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Top 11 AAA gaming titles that released in 2019 | Candid.Technology

Call of Duty is one of the most widely played first-person shooter video games. Played by thousands of players worldwide, Call of Duty MW2 is the latest addition to the franchise.

In this article, we explain how you can fix dev error 657.

Restart your PC and launcher

This should be your first option. Just close the game and then restart the PC. If you don’t want to restart the PC, at least restart the game launcher.

Also read: How to fix MW2 travis-rilea error? 

Verify the game files (on Steam)

Here’s how to verify game files on Steam:

Step 1: Head over to your Steam Library, right-click on Victoria 3 and select Properties.

Step 2: Head over to the Local Files tab.

Step 3: Click on Verify integrity of local files… and let Steam do its thing. 

Verify the game files (on

Step 1: Click on the All games option and then select Call of Duty Warzone 2.0

Step 2: Click on the gear icon next to the play/update button and then select Scan and Repair from the menu.

Step 3: Confirm the process by clicking on Begin Scan.

Also read: How to fix Steam error reference: library_7668455_5f24d6ddd9f44727? 

Update the drivers

Outdated GPU drivers can cause problems, especially in those tasks which require extensive GPU usage. Thus, you should update the drivers as soon as the manufacturer releases them. Check the official website of Nvidia, Intel or AMD for further information and updates.

To check your computer’s GPU, follow the instructions given below:

Step 1: Open Device Manager from either the Search bar or the Control Panel.

Step 2: Next, click on Display Adapters to see the graphics card.

Also read: How to fix Dead by Daylight error code 500?

Update the game

Update the game to fix some minor bugs. If you are on Steam, here are the instructions:

Step 1: Open the Steam client and then navigate to Library.

Step 2: Select Call of Duty Warzone 2 and then select Update.

If you are a player, here are the instructions:

Step 1: Open the client and then click on Call of Duty Warzone 2.

Step 2: Click on the gear icon and then select Check for Updates.

Check your internet connection

Sometimes, your internet connection is not working optimally or there might be an internet outage in your area. Check with your Internet Service Provider (ISP) or flush DNS.

Step 1: Open the Command Prompt by pressing Windows key + R.

Step 2: Enter ipconfig /flushdns to reset DNS settings to default.

Also read: How to make a human in Little Alchemy 2?


Kumar Hemant

Deputy Editor at Candid.Technology. Hemant writes at the intersection of tech and culture and has a keen interest in science, social issues and international relations. You can contact him here: