Antivirus software remains necessary in 2026 due to evolving cyber threats targeting PCs and smartphones. Free antivirus solutions provide basic protection but lack advanced features like ransomware defense and identity monitoring, making paid versions advisable for users handling sensitive information. Modern antivirus programs are designed to minimize performance impact, even on older devices. Macs and iPhones are not immune to malware, as cyber attackers exploit system permissions and phishing links, necessitating antivirus tools for added protection. Premium antivirus subscriptions offer multi-device coverage, making them practical for families or individuals with several devices.