In 2026, leading antivirus software for Windows 11 includes Bitdefender, Norton, Kaspersky, and McAfee, known for robust malware protection and real-time scanning. While Microsoft Defender is included with Windows 11, third-party antivirus solutions offer advanced features like ransomware protection, VPN access, and improved privacy controls. For gamers, Bitdefender and Norton provide specialized gaming modes that reduce interruptions while maintaining strong threat protection. Free antivirus programs offer basic protection but lack the advanced features and higher detection rates of paid options. Key factors for selecting antivirus software include malware protection effectiveness, system performance impact, pricing, additional features, ease of use, and compatibility with devices.