If Battle.net is having issues on your Windows PC, here's how to fix it.

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.

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:

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.

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:

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.

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:

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.

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:

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:

Sometimes, clearing the Battle.net folder fixes this issue. Here's how to do that:

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.

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.

Jack has been a freelance tech journalist for more than a decade. He has covered Windows Vista, 7, 10, and 11 topics within a multitude of guides for Make Use Of and numerous other websites.

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