B4Failure consists of two standalone service applications. The primary service "TSL_B4FService" and the secondary "TSL_B4FHelper".
The "TSL_B4FService" service is the heart of B4F, checking all your systems with the checks you have configured. This service will pickup all changes made from the web interface, and the GUI, and execute them, according to your settings. The service user can be configured for easier monitor configuration, see the configure service account for more details.
The "TSL_B4FHelper" service helps to prevent a main service failure, leaving your systems unmonitored. The service automatically starts with the "TSL_B4FService" service, and stops only if you stop it manually. No configuration is needed/neccesary with this service.