Many users install the Battle.net software to play Hearthstone, Call of Duty: Warzone, World of Warcraft, and Overwatch. Those are all multiplayer games that get updated regularly. However, a BLZBNTAGT000008A4 error can arise for some players when they try to update or install those Battle.net titles and others.
When you see that error code, it means Battle.net can’t download the required files for patching or installing games. Consequently, users can’t play games for which that Battle.net error code pops up. These are some of the best ways to fix the BLZBNTAGT000008A4 error in Windows 11/10.
1. Change Your Game’s Region Setting
Changing an affected game’s regional setting is a BLZBNTAGT000008A4 resolution that’s worked for some players. In Battle.net, you can select Europe, Americas, or Asia regional settings for games. This is how you can change a game’s regional setting within the Battle.net client software:
- Start the Battle.net launcher.
- Click All Games, and then select the game for which you need to fix the BLZBNTAGT000008A4 error.
- If the game starts automatically downloading, click the Pause Download option.
- Press the Regions button shown directly below.
- Select a different region setting for the game.
- Then select the Resume Download option.
2. Disable or Uninstall Third-Party Antivirus Software
Third-party antivirus utilities can interfere with Battle.net updating and even installing games. Therefore, disabling such security software could be a possible solution for the BLZBNTAGT000008A4 error. To turn off shield protection for any third-party software you might have installed, right-click its system tray icon to locate its disable setting.
If you don’t have any third-party antivirus software, temporarily turn off the Windows Security app’s real-time protection. The instructions in our “How to Turn Off Windows Defender” guide tell you how to disable that app’s shield. Try updating or installing the Battle.net game after disabling whatever antivirus software you have.
3. Turn Off the Windows Defender Firewall
Windows Defender Firewall is another built-in security utility that can conflict with Battle.net’s processes. That firewall can block outgoing and incoming internet traffic (or data transfer) for Battle.net and other software. You can ensure that firewall isn’t causing the BLZBNTAGT000008A4 error by disabling it like this:
- Open the Windows Defender Firewall applet in the Control Panel. If you’re not sure how to open the applet, check out the ways to open the Windows Firewall.
- Select the Turn Windows Defender Firewall on or off navigation link you’ll see on the left of the WDF applet.
- Click both of the two Turn off Windows Defender Firewall options within the Customize Settings window.
- Press OK to both apply settings and exit the window.
Then try patching your Battle.net game again to see if the BLZBNTAGT000008A4 error persists. If it doesn’t, Windows Defender Firewall was probably causing the issue. Try adding Battle.net to that firewall’s allowed apps as outlined in our “How to Allow Apps Through Windows Firewall” guide.
4. Close Background Startup Programs and Services by Clean Booting
Aside from antivirus tools, other third-party background programs and services can potentially conflict with Battle.net. You can eliminate (disable) such programs by stopping them from starting with Windows, otherwise clean booting. This is how you can perform a clean to disable background software in Windows 11:
- Open MSConfig in Windows (our guide on how to open MSConfig tells you how to do this).
- Uncheck the selected Load startup items checkbox on MSConfig’s General tab to disable that setting.
- Next, click Services to view the options shown directly below.
- Select Hide all Microsoft services to exclude more important non-third-party services from being disabled.
- Click the Disable all option to remove all other listed services from the Windows startup.
- Press Apply to save all the newly configured MSConfig settings.
- Select OK to exit the System Configuration tool, and click Restart on the dialog box.
- Check if the BLZBNTAGT000008A4 error persists after clean booting.
If this resolution resolves the BLZBNTAGT000008A4 error, try to identify what app or service might have been causing the issue beforehand. You can do that by manually re-enabling disabled programs and services one at a time. Re-enable disabled programs from Task Manager’s Startup tab. You can enable the services from the MSConfig Services tab you disabled them all from.
5. Change the DNS Server Settings
Some Battle.net users have said switching to a different DNS (Domain Name System) fixed the BLZBNTAGT000008A4 error on their PCs. To change your DNS server, you’ll need to adjust some protocol DNS settings for your internet connection. This is how you can reconfigure those options to change your DNS server to Cloudflare:
- Right-click Start, select Search, and input network connections in the text box.
- Select the View network connections result in the search tool.
- Right-click your internet connection in the Network Connections Control Panel applet and select Properties.
- Click Internet Protocol Version 4 to select it, and press the Properties button.
- Select Use the following DNS server addresses within the Internet Protocol Version 4 window.
- Enter 126.96.36.199 within the Preferred DNS server box.
- Next, type 188.8.131.52 in the Alternative DNS server value box.
- Click OK to confirm the new DNS server settings.
6. Reset Winsock and Flush the DNS Cache
Resetting Winsock Catalog and flushing (clearing) the DNS cache might resolve potential network issues causing BLZBNTAGT000008A4. For example, a corrupted DNS cache is a possible cause a flushdns command could resolve. You can flush the DNS cache and reset Winsock Catalog by entering a couple of CMD commands like this:
- Open the Type here to search tool (press Win +S), and input Command Prompt in that utility’s text box.
- Click Command Prompt in the search tool with your mouse’s right button to select Run as administrator.
- To clear your DNS cache, input this command text and hit Return:
- You can reset Winsock by typing in the following CMD command and pressing Enter:
netsh winsock reset
- Restart your PC after executing the network commands.
7. Delete the Battle.net Folder
Sometimes, clearing the Battle.net folder fixes this issue. Here’s how to do that:
- First, press the Win + X Power User menu keyboard shortcut and select the Task Manager option.
- If it’s not already open, switch to the Processes tab in Task Manager.
- Right-click any Battle.net and Agent processes to select their End task options.
- Close out of Task Manager, bring up the Power User menu again, and select Run from there.
- Input C:ProgramData in Run, and click that accessory’s OK option.
- Right-click the Battle.net subfolder in ProgramData to select Delete.
- 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 generate connection and patching issues for Battle.net and other software. If you have proxy enabled, disabling that setting could be a potential solution for the BLZBNTAGT000008A4 error. This is how you can disable proxy in Windows 11/10.
- Launch Run, and type inetcpl.cpl in that accessory’s text box.
- Select the Internet Properties window’s Connections tab.
- Click LAN Settings to bring up the options shown directly below.
- Deselect (or uncheck) the Use a proxy server checkbox to disable that setting.
- Press OK to exit the Local Area Network (LAN) Settings window.
- Click Apply on 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 outlined above do indeed fix the BLZBNTAGT000008A4 error. So, it’s likely that one of them will also get that Battle.net issue sorted out on your desktop or laptop. With the BLZBNTAGT000008A4 error resolved, you’ll be able to patch and enjoy all your Battle.net games again.