Microsoft Defender is the default antivirus solution for Windows users, offering real-time alerts and a built-in firewall. TotalAV is a notable alternative that provides a range of features, including an ad blocker, data breach monitoring, and performance optimization tools. Both Microsoft Defender and TotalAV have a protection rate of 99.1%. TotalAV includes features like anti-phishing measures, a VPN service, and a password manager with 256-bit AES encryption. Microsoft Defender is free with Windows, while TotalAV has three pricing tiers: Premium, Internet Security, and Total Security, with prices starting at .95 per year. Microsoft Defender offers basic customer support, while TotalAV provides 24/7 dedicated support and a knowledge base.