Compare the best free antivirus tools for Windows 10 in 2026, including real-time malware protection, phishing defense, ...

Windows Defender has several security settings, including some you need to switch on to get the utmost protection. Here's why.

Windows Defender is a capable antivirus solution built into Windows itself. Unless you’ve installed a different antivirus program on your Windows 11 or Windows 10 PC, your PC is using it right now.