Antivirus software should effectively block malware threats and receive regular updates. It is advisable to choose software with high ratings from reputable labs like AV-Test. The software should not consume excessive system resources, and personal testing through free trials is recommended. Antivirus solutions monitor user activities to identify and neutralize threats, prioritizing user privacy by anonymizing data and not selling it. Many providers offer bundled services, including ransomware protection, phishing protection, password managers, VPNs, safe browsing tools, parental controls, and identity theft protection. While bundles can save time and money, individual tools may be more suitable for specific needs. Leading antivirus solutions for Windows often extend protection to Android, iOS, and MacOS, though some features may be limited on non-Windows platforms. Initial discounts for antivirus solutions may lead to higher renewal prices, and plans typically cater to multiple devices, with options for single or dual-device plans available.