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How to resolve DEV ERROR 5820 in MW3 And Warzone

Hey there, fellow gamer! If you’re pulling your hair out over the dreaded DEV ERROR 5820 in Call of Duty: Modern Warfare 3 and Warzone, don’t worry – we’ve got your back. This pesky error can be a real game-breaker, but with a few simple tricks, you’ll be back to dominating the battlefield in no time.

How to resolve DEV ERROR 5820 in MW3 And Warzone

Solution 1: Check MW3 server status

First things first, let’s check the MW3 server status (Online Service and Downdetector). If there are no green lights, it means there’s a server issue, and you’ll need to sit tight until it’s resolved.

Solution 2: Restart MW3 game

The next solution suggested is to restart your MW3 game. A quick restart of the game can work effectively to fix the error and you can again back into the game.

Solution 3: Switch hosts in the private match

If a player is playing a Private Match with another player thn you should give a prvilege to the hosting and allow them to start the match. Doing this will help to troubleshoot the error.

Solution 4: Turn off on-demand texture streaming

  1. Go to Settings option in the game.
  2. Choose Graphics > Quality tab > Details & Textures.
  3. Look for On-Demand Texture Streaming option and turn it off.

Solution 5: Disable in-game overlays

For Steam user: Launch Steam > Settings > In-game, toggle off “Enable the Steam overlay while in-game” option.

For Discord overlay: Go to User Settings > Game Overlay tab > switch off Enable in game overlay option.

For GeForce Experience: Open GeForce experience > tap on Gear icon beside username > click on General > switch off “In-Game Overlay” options.

Disable in-game overlays

Solution 6: Verify integrity of game files

  1. Launch Steam client > tap on Library > right tap on MW3.
  2. Choose Properties > go to Local Files option.
  3. Choose Verify Integrity of Game Files option.
  4. Once done, wait for the process and then check the issue.

Solution 7: Change your calling card or emblem

  1. Launch Modern Warfare 3 > then go to Customize.
  2. Choose Calling Card box > choose any other card apart from already equipped.
  3. Go to Emblem box via Customize tab > change Emblem from here.

Solution 8: Switch private match settings

Many users have reported about changing the Private Match settings has worked to fix the issue. Here, players have to redure the bots number in lobby and swtching the map and mode.

Solution 9: Submit support ticket to Activision

When everything fails then its time to take help from support team. You sould contact Activision support by submitting a ticket. They will further check the issue and will try to resolve it. Just open MW3 support page and follow the instructions and then send the report.

Remember, dealing with errors like this can be frustrating, but stay positive! With a little persistence and these handy tips, you’ll be back to fragging your enemies and racking up those killstreaks in no time. Happy gaming!