Error 401 Every Time Trying To Play MW2 [Fix]

If you have an Error 401 Every Time Trying to Play MW2, don’t worry; We will give you some tips to solve this problem.

Even though Call of Duty Modern Warfare 2 is one of the best shooting games in the world, many bugs and errors in the game hinder the player from being able to play it. MW2 Dev Error 401 is a new error that occurs when you try to sneak a game.

What Is Dev Error 401 In MW2?

Error 401 Every Time Trying to Play MW2 usually indicates a problem with authentication or permissions when trying to access the game’s online content. First of all, dev error 401 in MW2 can correspond to dev errors 292 and 11642, which are some of the system’s problems when trying to run a personal computer.

Also, this error sometimes occurs when you try to insert a card.

401 How To Fix Developer Error?

Infinity Ward confirmed this bug and fixed it in update season 1. If the bug persists, try changing the custom frame rate from infinite to unlimited.

  • Start the game
  • Open the Settings tab
  • Find the images tab and click on it
  • Click the Show tab
  • Click “Lower rate limit” and change it to unlimited

If changing the threshold value doesn’t work, let’s proceed with the solution:

  1. Check and restore game data integrity
  2. Update your GPU drivers
  3. Restore the game
  4. Turn off the VPN
  5. upgrade your internet connection

1. Check And Restore Game Data Integrity

You can have a lot of problems with developer errors due to corrupted or missing game files. You need to download and fix incorrect game data. Here’s how to do it:

Steam Users:

  • Open the building and click on Library.
  • In the list of installed games, right-clickCOD MWII.
  • Click Properties, scroll down to Local Information, and click.

Error 401 Every Time Trying to Play MW2 [Fix]

  • ClickCheck Game Information for accuracy.

Error 401 Every Time Trying to Play MW2 [Fix]

  • You have to wait for the job to finish.
  • After that, turn on the computer.

Battle.net Users:

  • Open the net client and click on Call of Duty: Modern Warfare II.
  • Next, you have (glass icon) Options, click on it.
  • Click the search and return button.
  • Select StartScan and wait for the job to complete.
  • After that, turn on the computer.

2. Update Your GPU Drivers

Fixing the graphics card driver would be the best solution to fix the bug in the game. Outdated GPU drivers can often cause various crashes, connection problems, and even errors.

Battle.net also recommends updating your drivers as this may be the solution to the 401 developer error.

  • Download Nvidia drivers
  • Download AMD drivers

You can use the device manager to update your drivers. However, if this is complicated or time-consuming, you can use a trusted driver update tool, which can scan, download, and install your drivers.

  1. Update and install our byte drivers.
  2. Run hard and it will start scanning.
  3. Click the Update All button now to fix the error.

3. Restore The Game

Steam Users:

  • Open the Steam client, go to Library, and click on COD MWII.
  • automatically keeping you up to date. If there is an update, click the Update button
  • After installing the update, restart your computer and start the game.

Battle.net Users:

  • Open the net app.
  • Next, you have a (glass icon)option, click on it.
  • Click to check for updates and complete the process.
  • Restart your phone and computer

4. Turn Off The VPN

To avoid network problems, it’s best not to use a VPN tool on your computer or router.

While VPNs can connect you to servers on the other side of the world, they don’t help reduce latency. The longer your playground delays, the more communication problems you will have.

5. Upgrade Your Internet Connection

  • First, make sure your internet connection is reliable, fast, and consistent.
  • Do not use Wi-Fi to increase internet speed while gaming.
  • Run online apps like Skype, Messenger, and Chrome.
  • If you are using WiFi, try restarting your router.

If you are having a problem or wondering why your FPS drops, read our article on CoD Lag.

I hope one of the solutions above will help you to solve the DEV 401 error you are facing. Otherwise, contact Activision support or wait until the developers release a free one.

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