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1. Avast | Download Free Antivirus & VPN | 100% Free & Easy

   https://www.avast.com/en-us/index

   Avast One. Award‑winning free antivirus, online scam protection, privacy tools and more. All in one simple app.

2. The Best Antivirus Software We've Tested for 2026 | PCMag

   https://www.pcmag.com/picks/the-best-antivirus-protection

   3 days ago ... Our Top Tested Picks · Bitdefender Antivirus Plus · Norton AntiVirus Plus · McAfee AntiVirus · ESET NOD32 Antivirus · Emsisoft Anti-Malware · G ...

3. Understanding Anti-Virus Software - CISA

   https://www.cisa.gov/news-events/news/understanding-anti-virus-software

   Anti-virus software scans files or your computer's memory for certain patterns that may indicate the presence of malicious software (ie, malware).

4. Windows Security: Defender Antivirus, SmartScreen, and More

   https://www.microsoft.com/en-us/windows/comprehensive-security

   What is malware? · Microsoft Defender Antivirus · Microsoft Defender SmartScreen · Windows Firewall · Bluetooth protection · Secure Wi-Fi · Virtual private networks ( ...