BLZBNTBTS0000004A

Updated: 2 weeks ago
Article ID: 22833
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Common Problems

Failed to download a required update. Please check your internet connection and try again.
BLZBNTBTS0000004A

This error is usually caused by an unstable internet connection or a third-party program that is blocking access. Follow the steps below to resolve the issue.

  1. If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
  2. Try closing background applications to resolve any software conflicts.
  3. Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
  4. Check your network configuration to find any issues with your firewall, router, or port settings.
  5. Delete the Battle.net Tools folder to automatically rebuild outdated or corrupt files.
  6. Run a security scan to remove any viruses or malware infections.

Tried everything here?

If you have tried these steps and still require assistance, visit our Technical Support Forums (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) (Heroes of the Storm) (Overwatch) or contact us.