If you’re experiencing the same Dev Error when playing private matching or tournaments, the most likely causes are a conflicting in-game overlay, an outdated GPU driver, or outdated BIOS firmware. Additionally, you might also see this error due to the notorious ’emblem card’ glitch or when you have the game installed on a traditional HDD while Windows is installed on a newer NVMe drive.
1. Disable In-Game Overlay
The first major culprit that you should investigate is the in-game overlay software that is currently active on your PC. This issue is confirmed to occur on both Windows 10 and Windows 11. Take a look and see if you presently have any in-game overlay program that is running on your PC and disable it temporarily to test out this theory. Another possible option is that the issue is being created by two competing overlay programs. In this instance, you should be able to resolve the issue by deactivating or uninstalling the non-essential in-game overlay. In most instances, the issue is caused by either Discord’s in-game overlay or Nvidia Experience’s overlay function. Follow the sub-guides below to temporarily remove overlay tools and see if the Dev 5820 problem is resolved. Note: In case you’re using a specific overlay tool that is neither Nvidia Experience nor Discord, you can follow the third sub-guide below in order to get rid of it.
1.1. Turn off Discord Overlay
If you’re utilizing Discord’s Overlay function, you’ll need to go to the User settings and disable the feature from the Overlay tab. Here’s how to do this:
1.2. Disable Nvidia Overlay
If you’re utilizing the overlay technology from Nvidia Experience, follow the instructions below to disable in-Game Overlay. Here is what must be done:
1.3. Uninstall the overlay tool
If you have an overlay feature (other than Discord or Nvidia Experience) installed and you have no use for it, you can delete it to eliminate the potential of a conflict. To uninstall the possibly conflicting overlay utility, follow these steps:
2. Update GPU drivers to the latest
The Dev Error 5820 might be caused by an obsolete or severely outdated GPU driver or a missing physics module. If you experience this problem only during action-packed sequences, but never in the lobby or when nothing is happening on the screen, you can assume that your GPU drivers are out-of-date, corrupted, or missing key dependencies. The issue can be repaired by updating the GPU drivers and the physics module that governs the game’s mechanics. If this is the case and you have not recently updated your GPU drivers, erase your existing GPU drivers and reinstall the most recent version before attempting to start the game again: GeForce Experience – Nvidia Adrenalin – AMD Intel Driver – Intel
3. Change the emblem or calling card (if applicable)
If this problem started occurring after you changed your card or embedded it into a random item, you might be able to fix the problem simply by selecting a different item. This fix has been confirmed to work by a huge variety of players running Warzone on both PC or consoles (Playstation and Xbox). If you didn’t try this already, follow the instructions below to change the emblem & calling card for your active Warzone account:
4. Install the game in the same directory as Windows
Another issue that might indirectly cause the Dev Error 5820 critical crash is a scenario in which the game is installed on a traditional drive (HDD) when the operating system (Windows) is installed on a newer NVMe drive. This will produce unintended behaviours, such as crashing the game if the engine is unable to keep up with the transfer speeds of the NVMe drive. The solution, in this case, is simple – you will need to move the game on the Windows drive with faster transfer speeds. Our recommendation is to move the main game folder in: C:\Program Files (x86) This solution is not always ideal since COD’s size is over 200 GB and some smaller NVMe drives might not be able to accommodate it, but this solution has been confirmed by a lot of users. Update: You should be able to simply move the game folder from one drive to another without the need to reinstall. Once you launch the game manually from the new path, the launcher should acknowledge it. However, going this route will break any shortcuts you previously established, so make sure to create new ones.
5. Update BIOS to the latest firmware
If your BIOS version predates Windows 11’s official release, this Warzone DEV problem might be caused by an old BIOS or UEFI interface. To resolve this issue, you must update your BIOS or UEFI to the most recent version available. Multiple afflicted gamers reported that upgrading their BIOS firmware to the latest version resolved the issue. Changing your motherboard’s BIOS is no longer as difficult as it once was since all of the major motherboard makers now offer flashing software that allows you to do it without requiring a high level of technical expertise. The best course of action is to visit the website of your motherboard’s manufacturer and search the Drivers Download section for a BIOS update program. ASUS’ E-Z Flash, MSI’s MFlash, Gigabyte’s @BIOS Live Update, and so on. Note: Before starting the update process, read the official documentation thoroughly. Follow the on-screen directions to update your BIOS, and after restarting your computer, launch the game and see if the Dev Error 5820 is now fixed.
