Other reasons can be that your antivirus blocks the program, some security certificates are missing, or you don’t have the right permissions. Now that we know the possible causes, let’s go through some troubleshooting steps that should help you resolve the error.
1. Update Your Drivers
Updating your drivers can improve performance and fix compatibility issues. If a game isn’t loading or working as it should, it’s a good idea to make sure your drivers are up to date.
2. Clear the Battle.net Cache
Corrupted Battle.net launcher cache may cause the BLZBNTBNA0000000C error. Clearing the cache can often resolve this.
3. Launch the Battle.net Client as Administrator
Sometimes, Battle.net needs extra permissions to run properly. Running it as an administrator can help fix launch problems.
4. Disable or Uninstall the System’s Antivirus or Firewall
It’s possible that your antivirus software or firewall is interfering with Battle.net, causing the BLZBNTBNA0000000C error. Try temporarily disabling or uninstalling any third-party antivirus or firewall programs to see if the error goes away.
5. Reinstall the Battle.net Client
If none of the previous solutions worked, uninstalling and reinstalling the Battle.net Client can help, especially if there’s a bug or corruption in the application itself. Reinstalling will replace all program files with fresh ones.
