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How to Fix Warzone Error Code BLZBNTBGS00004666 on Windows 11: Step-by-Step Solutions

Warzone is a popular battle royale game enjoyed by many on Windows 11. However, some players encounter the frustrating error code BLZBNTBGS00004666, which can prevent them from launching or playing the game. This guide will help you fix this error with clear and simple steps.

The error code usually relates to connectivity or authentication issues with Blizzard’s servers. Fortunately, many common fixes are straightforward and do not require advanced technical skills.

Following the steps below in order can help you get back to playing Warzone quickly and smoothly. Each solution explains why it works and how to do it properly.

Let’s dive into solving the BLZBNTBGS00004666 error on your Windows 11 PC.

Quick Note Before You Begin

  • Check your internet connection: A stable and fast internet connection is essential for Warzone to connect properly to Blizzard servers.
  • Make sure Blizzard servers are online: Sometimes the error is on Blizzard’s side. You can check their server status online before troubleshooting your PC.
  • Run the game as administrator: This can help with permission issues that might block proper server communication.
  • Restart your PC: Sometimes a simple restart resolves temporary glitches.

Step 1: Restart Battle.net and Your PC

Before making any changes, close the Battle.net launcher completely. To do this, right-click the Battle.net icon in the system tray and select Exit. Then, restart your computer to clear any temporary issues.

Restarting helps because it refreshes your system’s connections and clears caches that might interfere with the game’s connection to Blizzard servers.

Step 2: Run Battle.net and Warzone as Administrator

Running programs as administrator can fix permission-related problems that block network access.

  1. Right-click the Battle.net shortcut on your desktop or Start menu.
  2. Select Properties.
  3. Go to the Compatibility tab.
  4. Check the box that says Run this program as an administrator.
  5. Click Apply and then OK.
  6. Repeat these steps for the Warzone executable file, usually located in the game installation folder.
  7. Launch Battle.net and try starting Warzone again.

Step 3: Clear DNS Cache

Sometimes, DNS issues can cause connection errors. Clearing the DNS cache helps your PC find correct server addresses.

  1. Press Windows key + S and type Command Prompt.
  2. Right-click Command Prompt and select Run as administrator.
  3. In the black window, type the following command and press Enter:
ipconfig /flushdns

You should see a confirmation message that the DNS Resolver Cache was flushed. Close the window and restart your PC.

Step 4: Reset Network Settings

Network settings might be misconfigured, causing errors connecting to Blizzard servers. Resetting them can restore default configurations.

  1. Press Windows key + I to open Settings.
  2. Click Network & Internet.
  3. Scroll down and select Advanced network settings.
  4. Click Network reset at the bottom.
  5. Click Reset now and confirm.
  6. Your PC will restart automatically.

After the reset, reconnect to your Wi-Fi or Ethernet and try launching Warzone again.

Step 5: Temporarily Disable Firewall and Antivirus

Sometimes, Windows Firewall or third-party antivirus software block Warzone from connecting to Blizzard servers. Temporarily disabling them can test if this is the cause.

  1. Press Windows key + S and type Windows Security.
  2. Open Windows Security and go to Firewall & network protection.
  3. Select your active network and toggle Microsoft Defender Firewall off temporarily.
  4. If you use third-party antivirus, open its control panel and disable protection temporarily.
  5. Try launching Warzone. If it works, add exceptions for Warzone and Battle.net in your firewall and antivirus settings.
  6. Remember to re-enable firewall and antivirus after testing.

Step 6: Repair Battle.net and Warzone Game Files

Corrupted game files can cause errors. Battle.net has a built-in repair tool to fix these files.

  1. Open the Battle.net launcher.
  2. Select Call of Duty: Warzone from your game list.
  3. Click the Options dropdown below the game title.
  4. Choose Scan and Repair.
  5. Click Begin Scan and wait for the process to finish.
  6. Once complete, try launching the game again.

Step 7: Update Network Drivers

Outdated or faulty network drivers can cause connection errors. Updating them ensures compatibility and stability.

  1. Press Windows key + X and select Device Manager.
  2. Expand Network adapters.
  3. Right-click your primary network device and select Update driver.
  4. Choose Search automatically for drivers.
  5. Follow any prompts to complete the update.
  6. Restart your PC and test Warzone again.

Alternative Method: Use a VPN

Sometimes regional network issues or ISP restrictions cause connection errors. Using a VPN can route your connection through a different server and resolve these problems.

If you choose to try this, select a reputable VPN service, connect to a nearby server, and then launch Warzone.

Frequently Asked Questions (FAQs)

What does error code BLZBNTBGS00004666 mean?

This error usually indicates a problem connecting to Blizzard’s authentication servers. It can be caused by network issues, firewall blocks, or corrupted files.

Is this error related to my internet connection?

Yes, a poor or unstable internet connection can trigger this error. Always check your connection first.

Will reinstalling Warzone fix this error?

Reinstalling can help if your game files are corrupted, but it should be a last resort after trying repairs and scans.

Can I play Warzone offline if this error appears?

No, Warzone requires a stable online connection and Blizzard server authentication to play.

Does Blizzard provide official support for this error?

Yes, Blizzard has support articles and forums where you can find updates and help for this error.

When Nothing Works

If you’ve tried all the above steps and still see error code BLZBNTBGS00004666, consider the following final options:

  • Contact Blizzard Support: Visit the official Blizzard Support website to submit a ticket or chat with an agent.
  • Check for Windows Updates: Sometimes system updates fix underlying network issues.
  • Reinstall Battle.net launcher: Uninstall and reinstall the Battle.net app to fix launcher-specific problems.
  • Try on a different network: Connect to another Wi-Fi or use a mobile hotspot to rule out ISP problems.

These last steps often help resolve stubborn issues or confirm if the problem lies outside your PC.

Conclusion

The BLZBNTBGS00004666 error in Warzone on Windows 11 is usually related to network or permission problems. By restarting your PC, running Battle.net as administrator, clearing DNS cache, resetting network settings, and checking firewall or antivirus blocks, you can resolve most cases.

Using Battle.net’s repair tool and updating network drivers also helps fix corrupted files and improve connectivity. If needed, VPN usage or contacting Blizzard Support are good next steps.

Following this guide step-by-step will give you the best chance to get back into the game without frustration. Remember, patience and a methodical approach are key to troubleshooting these errors successfully.

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