BLZBNTBTS0000005C

This error occurs when the Battle.net Update Agent can't start due to missing or corrupted data. The Battle.net Update Agent is the program that launches, updates, and installs your Blizzard games.

1. Restart your computer to resolve problems caused by programs and services running in the background.
2. Delete the Battle.net Tools folder to automatically rebuild outdated or corrupt files.
3. Try creating a new administrator account to resolve permissions issues.
4. Close all other applications to resolve software conflicts and free up resources.
5. Uninstalling and reinstalling the Battle.net App may resolve rare launcher issues.

If the previous troubleshooting steps didn't resolve the problem, you can ask the Blizzard player community for help on the tech support forums (if available) or other community gaming sites. Local computer or network technicians may also be able to help if you've exhausted all other resources.