Easy to use, tough on malware. BullGuard Antivirus provides powerful layered protection against all types of malware such as phishing attempts and trojans designed to steal your banking data Easy to use, tough on malware. BullGuard Antivirus provides powerful layered protection against all types of malware such as phishing attempts and trojans designed to steal your banking data. It makes short work of ransomware. And unlike some security software it has been designed to not slow you down. Whatever you do online, your computer will be fast, clean and malware-free.