Norton Antivirus | Download Antivirus Free TrialHow do antivirus apps and antivirus software work? Antivirus scans and helps remove viruses and malware files that enter a computer, tablet or smartphone. Norton AntiVirus technology uses machine learning to determine if a file is good or bad, and can do so even if it’s the first time seeing that file. Norton protection also uses “emulation” (running each file in a lightweight virtual machine) to
