Once you have registered / logged in the application, you will see that your device is at risk. The Antivirus will start scanning your device right away to ensure there are no infections.
You will also see that the
Antitheft module is disabled. Tap on Antitheft and you will be presented with the plugin main page.

The
Antitheft module requires you to activate BullGuard as a "
Device administrator" in order to function. Tap on the top right button to enable the Antitheft plugin, then carefully read the information from the next screens and activate it.
Once you have enabled the Antitheft features and the Antivirus has finished the initial scan, BullGuard will be fully activated and will protect your device.