How To Fix Battle.net BLZBNTBGS80000021 Error?

Battle.net users encounter the error "BLZBNTBGS80000021 (3003)" when they want to log in to their account, and their access to the program is restricted. If you are facing suchaproblem and you have no idea what to do, you can reach the solution by following the suggestions we will leave below.

What is Battle.net BLZBNTBGS80000021 Error?

The "BLZBNTBGS80000021 (3003)" error that Battle.net users encounter when they want to log in to their account is caused byaconnection or server problem, restricting your access to the program. For this, we will try to solve it by telling youafew suggestions.

How To Fix Battle.net BLZBNTBGS80000021 Error

To fix this error, you can find the solution to the problem by following the suggestions below.

1-) Stop File Downloading in Background

Any file or application downloaded in the background can cause us to encounter various errorslike this. For this, stop the download of any file or application you downloaded in the background and run the Battle.net program again and check if the problem persists.

2-) Restart Your Modem

Refresh your internet by turning your modem device off and on again. After the modem restarts, close and reopen the Battle.net application completely and check if the problem persists.

3-) Register Another DNS Server

We can eliminate the problem by registering another dns server on the computer.

• Open Control Panel and select Network and Internet
• Open Network and Sharing Center on the screen that opens.
• Click on Change adapter settings on the left.
• Right-click on your Connection Type to open the Properties menu.
• Double-click Internet Protocol Version 4 (TCP /IPv4).
• Let's apply the settings by typing the Google DNS server we will give below.
  • Preferred DNS server: 8.8.8.8
  • Other DNS server: 8.8.4.4
• Then click on Verify settings on exit option and press OK button to perform the actions.

After doing this, let's move on to the next suggestion.

4-) Check Your Connection

The problem with the internet connection can cause many errors. If your internet connection is slowing down or disconnected, let's giveafew suggestions to fix it.

• If your internet speed is slowing down, turn your modem off and then on again. This process will relieve your internet alittle bit.
• We can eliminate the problem by clearing the Internet cache.

Clear DNS Cache

• Type "cmd" in the start search screen and run it as administrator.
• Command prompt screen by typing the followinglines of code one after the other and press enter.
  • ipconfig /flushdns
  • netsh int ipv4 reset
  • netsh int ipv6 reset
  • netsh winhttp reset proxy
  • netsh winsock reset
  • ipconfig /release
  • ipconfig /renew
  • ipconfig /registerdns
  • netsh interface tcp reset
  • netsh int ip reset
  • netsh int tcp set global autotuninglevel=normal
• After this operation, it will show that your dns cache and proxies have been cleared successfully.

After this process, restart the computer and run the Battle.net program and check if the problem persists. If the problem persists, let's move on to another suggestion.

5-) Change Server

Maintenance work on some servers may cause us to encounter various problemslike this. In addition, some servers being full can cause us to encounter such errors. For this, we can eliminate the problem by changing the server.

• Run Battle.net.
• Click the gear icon in the upper right corner and change where it says "Login Region".

After this process, you can check if the problem persists.

6-) MakeaVPN Connection

We can eliminate the problem by performingaproxy connection with the help of any vpn program. I can recommend you to use UrbanVPN program to realize VPN connection.

Click to Download UrbanVPN.

• First of all, let's close the Battle.net program running in the background completely with the help ofatask manager.
• Run UrbanVPN or any VPN program.
• Then perform the connection by selecting any country.

After the connection process is complete, you can run Battle.net and check if the problem persists.

7-) Run as Administrator

The application's failure to run with administrator rights may cause us to encounter various errorslike this. For this, close the Battle.net program completely and run it as an administrator and check if the problem persists.

8-) Turn off Antivirus Program

Disable any antivirus program you use, or delete it completely from your computer. If you are using Windows Defender, disable it. For this;

• Open the start search screen.
• Open the search screen by typing "Windows security settings".
• Click on "Virus and Threat Protection" on the screen that opens.
• Click on "Ransomware Protection" in the menu.
• Turn off "Controlled Folder Access" on the screen that opens.

After this, let's turn off real-time protection.

• Type "virus and threat protection" into the start search screen and open it.
• Then click on "Manage settings".
• Turn Real-time protection to "Off".

After performing this operation, we will need to add the Battle.net folder as an exception.

• Type "virus and threat protection" into the start search screen and open it.
Under
• Virus and threat protection settings, select Manage settings, and then under Exclusions Exclude select add or remove.
• Select Add an exclusion, and then select the Battle.net folder saved to your disk.

After this process, run Battle.net and check if the problem persists.

Yes, friends, we have solved our problem under this title. If your problem persists, you can ask about the errors you encounter by entering our FORUM platform.