How to fix Battle.net error BLZBNTAGT000008A4 in Windows 10 and 11

Many users install Battle.net software to play Hearthstone, Call of Duty: Warzone, World of Warcraft, and Overwatch. These are all multiplayer games that are updated regularly. However, a BLZBNTAGT000008A4 error may occur for some players when trying to update or install these and other Battle.net titles.

When you see this error code, it means Battle.net cannot download the files required to patch or install games. Therefore, users cannot play games for which this Battle.net error code appears. Here are some of the best ways to fix BLZBNTAGT000008A4 error in Windows 11/10.

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1. Change your game’s region setting

Changing the locale of an affected game is a resolution BLZBNTAGT000008A4 which worked for some players. In Battle.net you can select Europe, AmericasWhere Asia regional settings for games. Here’s how you can change a game’s locale in the Battle.net client software:

  1. Start the Battle.net launcher.
  2. Click on All the gamesthen select the game for which you need to fix the BLZBNTAGT000008A4 error.
  3. If the game begins to download automatically, click the Pause download option.
  4. press the Regions button displayed directly below.
  5. Select a different region setting for the game.
  6. Then select the Resume Download option.


2. Disable or uninstall third-party antivirus software

Third-party antivirus utilities can interfere with updating Battle.net and even installing games. Therefore, disabling such security software could be a possible solution to the BLZBNTAGT000008A4 error. To disable shield protection for any third-party software you may have installed, right-click its system tray icon to locate its disable setting.

If you don’t have third-party anti-virus software, temporarily disable Windows Security app real-time protection. The instructions in our “How to disable Windows Defender” guide tell you how to disable the shield for this application. Try updating or installing the Battle.net game after disabling your antivirus software.

3. Disable Windows Defender Firewall

Windows Defender Firewall is another built-in security utility that can conflict with Battle.net processes. This firewall can block outgoing and incoming Internet traffic (or data transfer) for Battle.net and other software. You can ensure that the firewall is not causing the BLZBNTAGT000008A4 error by disabling it like this:

  1. Open the Windows Defender Firewall applet in Control Panel. If you don’t know how to open the applet, see Windows Firewall opening methods.
  2. Select the Enable or disable Windows Defender Firewall navigation link that you will see on the left of the WDF applet.
  3. Click on both Disable Windows Defender Firewall options in the Customize Settings window.
  4. Hurry OKAY to apply the settings and exit the window.

Then try patching your Battle.net game again to see if the BLZBNTAGT000008A4 error persists. If not, Windows Defender Firewall was likely causing the problem. Try adding Battle.net to this firewall’s allowed apps as shown in our “How to allow apps through Windows Firewall” guide.

4. Close Background Startup Programs and Services by Performing a Clean Boot

In addition to antivirus tools, other third-party background programs and services can potentially conflict with Battle.net. You can eliminate (disable) these programs by preventing them from starting with Windows, otherwise Clean Boot. Here is how you can clean up to disable background software in Windows 11:


  1. Open MSConfig in Windows (our guide on how to open MSConfig tells you how).
  2. Uncheck the selection Load Boot checkbox items on MSConfig General tab to disable this setting.
  3. Then click on Services to view the options shown directly below.
  4. Select Hide all Microsoft services to exclude more important non-third-party services from deactivation.
  5. Click it Disable all option to remove all other services listed from Windows startup.
  6. Hurry Apply to save all newly configured MSConfig settings.
  7. Select OKAY to exit the System Configuration tool, then click To restart in the dialog box.
  8. Check if the BLZBNTAGT000008A4 error persists after a clean boot.

If this resolution resolves the BLZBNTAGT000008A4 error, try to identify the app or service causing the problem first. You can do this by manually re-enabling disabled programs and services one by one. Re-enable Disabled Programs from Task Manager start tongue. You can enable services from MSConfig Services tab from which you disabled them all.


5. Change DNS server settings

Some Battle.net users reported that switching to a different Domain Name System (DNS) fixed the BLZBNTAGT000008A4 error on their PC. To change your DNS server, you will need to adjust some DNS protocol settings for your Internet connection. Here’s how you can reconfigure these options to change your DNS server to Cloudflare:

  1. Right click Beginselect Look forand entrance network connections in the text box.
  2. Select the Show network connections result in the search tool.
  3. Right-click your Internet connection in the Network Connections Control Panel applet and select Properties.
  4. Click on Internet Protocol Version 4 to select it, then press the Properties button.
  5. Select Use the following DNS server addresses in the Internet Protocol Version 4 window.
  6. Walk in 1.1.1.1 in the Preferred DNS Server box.
  7. Then type 1.0.0.1 in the Alternate DNS Server Value box.
  8. Click on OKAY to confirm the new DNS server settings.

6. Reset Winsock and Flush DNS Cache

Resetting the Winsock catalog and flushing (clearing) the DNS cache can resolve potential network issues causing BLZBNTAGT000008A4. For example, a corrupt DNS cache is a possible cause that a flushdns command could resolve. You can flush the DNS cache and reset the Winsock catalog by entering a few CMD commands like this:

  1. Open the Type here to search tool (tap To win +S), and input Command Prompt in the text box of this utility.
  2. Click on Command Prompt in the search tool with the right button of your mouse to select Execute as administrator.
  3. To flush your DNS cache, type this command text and press Come back:
    ipconfig /flushdns
  4. You can reset Winsock by typing the following CMD command and pressing Walk in:
    netsh winsock reset
  5. Restart your PC after running the network commands.

7. Delete the Battle.net folder

Sometimes clearing the Battle.net folder resolves this issue. Here’s how:

  1. First, press the To win + X Power User menu keyboard shortcut and select the Task Manager option.
  2. If it’s not already open, go to Process tab in Task Manager.
  3. Right click on any Battle.net process and Agent to select their Final task options.
  4. Close Task Manager, bring up the Power User menu again and select To run Of the.
  5. To input C:ProgramData in Run, then click on this accessory OKAY option.
  6. Right-click on the Battle.net subfolder in ProgramData to select Wipe off.
  7. Then launch Battle.net to see if the error is fixed.

8. Disable your proxy server settings

A proxy server gateway is a network security feature that can cause connection and patch issues for Battle.net and other software. If you have the proxy enabled, disabling this setting could be a potential solution to the BLZBNTAGT000008A4 error. Here is how you can disable proxy in Windows 11/10.

  1. Launch Run and type inetcpl.cpl in the text box of this accessory.
  2. Select the Internet Properties window Connections tongue.
  3. Click on lan settings to view the options shown directly below.
  4. Deselect (or uncheck) the Use a proxy server checkbox to disable this setting.
  5. Hurry OKAY to exit the LAN Settings window.
  6. Click on Apply in the Internet Properties window to save.

Enjoy your Battle.net games again

Battle.net users have confirmed in forum posts and comments that the potential resolutions described above do indeed fix the BLZBNTAGT000008A4 error. So it is likely that one of them will fix this Battle.net problem on your desktop or laptop as well. Once the BLZBNTAGT000008A4 error is resolved, you will be able to fix and enjoy all your Battle.net games again.


About Sally E. Bartley

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