Fix Error BLZBNTBNA00000012 In Warzone

El error Blzbntbna00000012 This is one of the most diverse errors in Warzone (especially Warzone Pacific), but it is mostly reported after a Battle.net or Warzone client update. To learn more about this issue and the methods you can apply to fix it, be sure to check out this post.

What causes the Blzbntbna00000012 error?

You may encounter the Blzbntbna00000012 error in Warzone due to many factors, but the following can be considered the main ones:

• Battle.net Client Cache Corrupted: If the Battle.net client cache is corrupted, you may encounter error Blzbntbna00000012.
• Line of arguments commands by Warzone: If Battle.net is set to launch Warzone in DirectX 11 mode, then the incompatibility of the latest game modules with the older version of DirectX may cause the issue in question.
• Warzone Installation Directory Location: If the Warzone installation path contains a reserved word (such as Desktop, Windows, PC, temp, etc.), then they can cause the Warzone Blzbntbna00000012 error.
• Administrator privileges requirement: If the Battle.net client or Warzone update (especially, after the famous DDoS attack on Blizzard) requires administrator privileges to access protected system files, but the client or the game does not have those permissions, then that can cause the Blzbntbna00000012 error.

How can I fix error Blzbntbna00000012?

To fix this error once and for all and continue enjoying your game, you can try any of the methods described below. So, take note of them and apply the one that best suits your situation.

Restart the Battle.net client

A temporary glitch in Battle.net modules (especially the Update Agent) can cause the Blzbntbna00000012 error in Warzone. In this case, restarting the Battle.net client after closing all related processes in the Task Manager can solve the problem.

• Get out of the game Warzone and closes the launcher Battle.net.
• Now, right click on Windows and select Task Manager.

• Then, complete All processes related to Warzone y Battle.net (such as UpdateAgent).

• Now right click in the client of Battle.net and select Run as administrator. If you are prompted to update, select No.

• If it asks for an update, let it update and once launched, check if the game does not have the Blzbntbna00000012 error.

Change the region in the Battle.net client

The Blzbntbna00000012 error could also be the result of a temporary Blizzard regional server glitch, and changing the region in the Battle.net client may resolve the issue.

• Open the application Battle.net and, near the right of the Play button, click the icon globe.
• Now select one different region (for example, if you use America, then select Europe) and then click the button Play to start Warzone.

• If it asks for an update, let it update and once launched, check if the game does not have the Blzbntbna00000012 error.

Delete the COD folder in Documents

The COD Modern Warfare folder in the user's Documents directory contains Warzone settings and configurations. If the contents of this folder are corrupted, it may result in the Blzbntbna00000012 error. In this context, you can fix the BLZBNTBNA00000012 error code by deleting the COD Modern Warfare folder (the game will create a new folder with default settings on launch) in the system's Documents directory.

• First, make sure you are not running no process related to Battle.net y Warzone in the system Task Manager.
• Then right click on Windows and select Run.

• Now browse To the next:
• Documents
• Then, remove Folder COD Modern Warfare and launch Warzone to see if the Blzbntbna00000012 error is cleared.

Clear Battle.net Cache

Warzone may display the Blzbntbna00000012 error if the Battle.net launcher cache is corrupted. Here, clearing the Battle.net cache may resolve the issue.

• First of all, make sure finalize the processes of Battle.net y Warzone in the system Task Manager.
• Then right click on Windows and select Run.
• Now browse to the following route:

%programmeddata%

• Then, remove folders related to Battle.net y Blizzard (like Blizzard Entertainment).
• Now browse to the following paths (one by one) in the Run command and remove Battle.net or Blizzard related folders:
• % application data%

% localappdata%

• Then launch Warzone and check if the Blzbntbna00000012 issue is resolved.
• Otherwise, check if when you start the game Warzone en safe mode solves the problem.

Remove Warzone command line argument in Battle.net client

Many users tend to set the Warzone command line argument in the Battle.net client to launch the game in DirectX 11 mode, but the incompatibility of the older DirectX version with the latest game modules may cause the Blzbntbna00000012 error. Here, removing the Warzone command line argument in the Battle.net client may resolve the issue.

• Open the client Battle.net and select Warzone.
• Now open the Options of the game and choose Game settings.
• then remove el argument in Command Line Argument and uncheck the option Command line argument.

• After this, guard changes and launch Warzone to see if the Blzbntbna00000012 error is cleared.
• Otherwise, check if repair warzone game on Battle.net fixes the issue.

Manually update the Battle.net client without uninstalling it

If the Battle.net client will not update to the latest version (either due to a network issue or interference from your system's security app), manually updating the Battle.net client without uninstalling it may resolve the issue.

• Start the client Battle.net and select Warzone.
• Now expand your Options and select Show in Explorer.

• then rename the folder Warzone/Modern Warfare and close the application Battle.net.
• After this, right click on Windows and select Task Manager.
• Then make sure finalize all processes, related with Warzone y Battle.net in the system Task Manager.
• Download last Battle.net client from the official website and once downloaded, right click in the client Discharged.
• Choose Run as administrator y sigue instructions for updating the client installation.
• Launch the Battle.net application and Don't install Warzone.
• Then open the Configuration from Battle.net and select Downloads.

• Click on Change en Search games and, when requested, point it to the folder you renamed in step 3.

 

• Open Warzone through the Battle.net client and check if Warzone is not experiencing the Blzbntbna00000012 error.
• If not, check if to update the client of Battle.net goes into beta solves the problem.

If the problem persists, check if modify la Warzone installation and just select Multiplayer solves the problem.

Rename or relocate the Warzone folder

There are some reserved names (Desktop, Windows, Downloads, PC, Temporary, etc.) that should not be in the game installation path and if your game installation has that name in your installation path then it may result in the Blzbntbna00000012 error. In this case, renaming or relocating the Warzone folder may solve the issue.

Rename the Warzone folder path

• Open the Battle.net client and select Warzone.
• Now, open the Options and select Show in Explorer.
• Check the rue of the game installation in the address bar and if you have any of the reserved names, rename that directory.
• Close the client of Battle.net and make sure finish all   related processes in Task Manager.
• Now start the client Battle.net and check if it shows the button Play or the button InstallIf it shows the Play button, click on it and check if the game works fine.
• If the Battle.net launcher displays the Install button For Warzone, open the Configuration from the Battle.net app.
• Opens Downloads and click Change en Search games.
• then write it down to the installation directory (with the path renamed) and then launch Warzone to check if it is free from the Blzbntbna00000012 error.

Relocate the Warzone folder

• If renaming the folder didn't work, relocating it may solve the problem.
• Open the Warzone folder (as mentioned above) and move it to another folder (preferably, in the root directory of the drive).

• Now finished all   related processes   Battle.net in Task Manager and start Battle.net. Don't worry if it shows the Install (not Play) button for Warzone.
• Then open Settings from the client > Downloads > click Change in Search games y indicate the new route.
• Now launch Warzone and check if it works normally.
• Otherwise, check if you place the Warzone folder en Program Files (x86) or Battle.net installation directory solves the problem.

Start as administrator from the installation directory

If the Battle.net client and Warzone game are unable to access a protected system resource due to the unavailability of administrator privileges, it may cause the Warzone error Blzbntbna00000012. In this scenario, launching the Warzone and Battle.net applications as an administrator may resolve the issue.

Launch the Battle.net client as administrator

• Right-click on the Battle.net icon and select Run as administrator.
• Now select Warzone and click To play.
• Then check if the Warzone game is running normally.
• If that doesn't work, check to see if running bootloader.exe as administrator in the Battle.net client installation directory resolves the issue.
• If not, check if when running bootstrapper.exe as administrator in the Battle.net client installation directory clears the error.

Please note that to make the process permanent, right click on the file, go to your compatibility tab, check Run this program as administrator.

Start Warzone as administrator

If the problem persists, make sure finalize the client of Battle.net and Warzone processes in Task Manager.

• Then open the client Battle.net as administrator and select Warzone.
• Now expand your Options and select Show in Explorer.
• Right click en Modern Warfare Launcher.exe and select Run as administrator.

• Waiting a few seconds and then right click en ModernWarfare.exe.
• Choose Run as administrator and once Warzone launches, check if it is free from the Blzbntbna00000012 error.
• On the contrary, log out of the client of Battle.net, Warzone launches , the administrator, ignored Battle.net and its login page, then check if the game starts normally.
• If that didn't work, complete All the tasks of Battle.net y Warzone in the System Task Manager. Then, start Vanguard and then, start Warzone as admin from the installation directory to check if that resolves the Warzone error in question.
• If the problem persists, check if launch another COD game and then switching to Warzone fixes it.

Set related processes to open as administrator

• Get ouf of Warzone and closes the client battle. net.
• Now make sure finalize all related processes in the system Task Manager.
• Then right-click on the client shortcut. Battle.net and select Properties.
• On the Shortcut tab, click Open file location and then in the Battle.net client installation directory, right-click Battle.net Launcher.exe and select Properties.
• Go to the tab Compatibility and brand Run this program as administrator. Make sure that Full Screen Optimization not this marked.

• Click on Apply/OK and repeat the same thing in Battle.net.exe.
• Open the Battle.net launcher and select Warzone.
• Expand your Options and select Show in Explorer.
• Brand Run this program as administrator in the tab Compatibility of the following files in the Warzone installation directory (make sure that Full screen optimization not this marked):

modernwarfare launcher.exe

modernwarfare.exe

• Then open Change DPI high on the tab Compatibility of both files (one by one) and make sure that Override high DPI scaling behavior beene unchecked.
• Now launch Warzone from the Battle.net client and check if it works fine.

Delete the files in the data folder of the Warzone installation directory

• First of all, get out of Warzone and the Battle.net client.de finalize all processes, related with Warzone y Battle.net in Task Manager.
• Then, browse to the Warzone installation directory as:

C/Games/Call of Duty Modern Warfare

• Now opens:

data/data

• then sort files by size y remove all files That have 0KB and 1KB sizes (leave the other files as they are).

• Launch Warzone from the Battle.net client and check if it is free of the Blzbntbna00000012 error.
• Otherwise, check if Delete files smaller than 20 KB in the Data/data folder of the Warzone installation directory resolves the issue.

Disable Windows UAC

Windows uses UAC to control access to essential and protected system files. If a Warzone or Battle.net process requires access to such a resource, but does not have the necessary privileges, it can cause the Warzone Blzbntbna00000012 error. In such a case, disabling Windows UAC may resolve the issue.

• Click on Windows, search and open User account control.
• Now in the User Account Control Settings window, slide the slider to Never notify and click Accept.
• Reboot your system and after restarting, launch Warzone to check if it works properly.

Disable or Uninstall the System Antivirus or Firewall

The Blzbntbna00000012 error in Warzone could be a result of the antivirus or system firewall interfering with the game modules. In this context, disabling or uninstalling the antivirus or system firewall can remove the Blzbntbna00000012 error.

Warning:

Proceed at your own risk as disabling or uninstalling your PC's antivirus/firewall may expose your data/system to threats.

• Locate the security product icon (for example, ESET) in the system tray (don't forget to check the hidden system tray icons) and right click about him.
• Now, in the menu that appears, select Pause protection and then confirm to deactivate protection. You may also see a UAC prompt, if so, click Yes.
• Then expand the security software menu in the system tray by right clicking on it and selecting Pause Firewall.
• Now confirms to disable the firewall and open the client battle. net.
• Starts Warzone and check if it works properly.
• Otherwise, right click on Windows and open Applications and features.
• Now click to expand the security app (for example, ESET) and click uninstall.
• Confirm to uninstall security software and sigue the on-screen prompts to uninstall it.
• Once this is done, restart your system and upon restart launch Warzone to check if it is free from the Blzbntbna00000012 error.
• Otherwise, check if you disable Windows Defender (antivirus and firewall) solves the problem.
• If the issue was resolved after disabling your antivirus/firewall (either third-party or Windows Defender), make sure to add an exception for the Battle.net and Warzone launcher in the security application (especially in the UDP and TCP inbound rules).
• If that didn't work, check if the use of a VPN solves the problem.

Reinstall the Battle.net client

You may encounter the Blzbntbna00000012 error in Warzone if the Battle.net client installation is corrupted. Here, reinstalling the Battle.net client may resolve the issue.

• Right click on Windows and select Applications and features.
• Now expand the client of Battle.net and click uninstall.
• then confirms to uninstall the Battle.net client and sigue the on-screen prompts to complete your uninstallation.
• Once this is done, restart your system and upon restart right click on Windows and select Run.
• Now browse to the following directories (one by one) and remove   remains from the Battle.net installation (any folder related to Battle.net, Blizzard, or Blizzard Entertainment).

%programmeddata%

%temperature%

% application data%

% localappdata%

• Then, download last Battle.net launcher y Right click on the installer Discharged.
• Choose Run as administrator y sigue on-screen instructions to complete the installation.
• Once this is done, click Right click on the launcher shortcut Battle.net and select Run as administrator.
• Log in with your credentials and open the Battle.net settings.
• Then select Downloads and click Change en Search games.
• Now write it down al Warzone installation directory and then launch the game to check if it works properly.

Reinstall the game

If the issue persists even after reinstalling the Battle.net launcher, reinstalling Warzone may resolve the issue.

• First of all, don't forget to make a backup of essential game data.
• start now Battle.net and select Warzone.
• Then click uninstall y sigue the instructions to uninstall Warzone.
• Once uninstalled, restart your system and when you restart it opens Applications and features.
• Now check if Warzone It is shown as installed, yes that's how it is, uninstall it y restart your system.
• When rebooting, remove   Warzone remains from the following directories:

%temperature%

%userprofile%\Documents

C: \ Windows \ Temp

C: \ Program Files (x86) \

C:\Program Files\

C:\Program Files\Common Files\Blizzard Entertainment

C:\Users\Public\Games\

C:\Users\Public\Public Documents\Blizzard Entertainment\

• then restart your system and when you restart it returns to to install el Battle.net client (make sure to follow the steps outlined in the solution above).
• Start the client Battle.net as administrator y reinstall warzone (more than 100 GB of data).
• Upon reinstallation, launch Warzone and hopefully the Blzbntbna00000012 error will not appear.

If reinstalling Warzone didn't work, check if Delete other Windows user accounts (don't forget to backup your data) resolves the issue. If the problem persists, you can reset windows system   factory defaults To solve the problem.