BLZBNTBTS0000005D

This error occurs when the Blizzard Update Agent is prevented from launching properly. This is usually caused by missing or corrupted Agent files. Follow the steps below to resolve the issue.

1. Restart your computer to resolve problems caused by programs and services running in the background.
2. Uninstalling and reinstalling the Battle.net desktop app may resolve rare launcher issues.
3. Configure your security software's exception list to allow Blizzard applications to run.
4. Try creating a new administrator account to resolve permissions issues.