Best Free Antivirus for Windows 11 & 10 - 2026

The best Free Antivirus for Windows

We installed each app on a clean Windows PC and checked install size, interface, file compatibility and support status. The order follows GramFile editor and user ratings.

  1. Microsoft Defender Logo

    Microsoft Defender

    ★ 4.9FreeBy Microsoft Corporation

    Built-in Windows shield stopping online threats.

    In conclusion, Microsoft Defender offers a robust and convenient security solution for everyday Windows users. Its real-time protection, cloud intelligence, and lightweight design make it a valuable asset. However, for those requiring advanced features, a premium antivirus suite might be a better c… Read full review

    • Free & Built-in
    • Real-time Defense
    • Always Updated
    • Firewall Shield
    • Simple to Use
    • Limited Features
    • Tech Savvy Needed (Maybe)
    • False Positives Possible
    Download Microsoft Defender
  2. Bitdefender Antivirus Free Logo

    Bitdefender Antivirus Free

    ★ 4.3FreeBy Bitdefender

    Free, basic shield against ever-changing cyber threats.

    For users seeking a free, lightweight antivirus solution with real-time protection and offline installation capabilities, Bitdefender Antivirus Free is an excellent option. It effectively safeguards against everyday threats and provides peace of mind. However, if you require features like on-demand… Read full review

    • Free! Great for basic protection.
    • Top-rated malware detection.
    • Lightweight, easy to run.
    • Lacks advanced features (firewalls, etc.).
    • Limited support options.
    • Upsells to paid versions frequently.
    Download Bitdefender Antivirus Free
  3. Avira Free Security Icon

    Avira Free Security

    ★ 4.4FreeBy Avira

    A free all-in-one suite guarding your PC against online threats, with a bonus VPN.

    Avira Free Security is a compelling choice for Windows PC users seeking a free, user-friendly security solution. It offers real-time protection against modern threats, performance optimization tools, and basic privacy features. If advanced email protection and robust firewalls aren’t prioriti… Read full review

    • Free, real-time malware & ransomware protection
    • Basic privacy with browser safety warnings
    • System optimization tools for smoother performance
    • User-friendly interface, easy to navigate
    • Lacks advanced features like email protection & robust firewall
    • Upsells to paid versions can be frequent
    Download Avira Free Security
  4. Kaspersky Free Icon

    Kaspersky Free

    ★ 4.5FreeBy Kaspersky Lab

    Offers basic protection against common threats for your devices.

    Kaspersky Free Antivirus is a good option for users on a budget who need basic protection against common online threats. However, those seeking advanced features and comprehensive security might consider paid antivirus solutions. It’s crucial to weigh your specific needs and security prioriti… Read full review

    • Top-notch threat detection
    • Lightweight, minimal performance impact
    • Free!
    • Lacks some features of paid versions (firewalls, etc.)
    • Some privacy concerns (data collection)
    • Might require advanced settings adjustment for some users
    Download Kaspersky Free
  5. Malwarebytes Logo

    Malwarebytes

    ★ 4.7FreeBy Malwarebytes

    A guard for your computer that removes malwares and protects your computer from online threats.

    Malwarebytes is a standout choice for anyone looking for effective, no-nonsense protection against malware and online threats. What sets Malwarebytes apart is its ability to detect and remove threats that other antivirus programs often miss, all while being lightweight and easy to use. Why choose i… Read full review

    • Lightweight; no system slowdown.
    • Catches missed threats.
    • Simple for beginners.
    • Stops malware, ransomware, spyware.
    • Regular updates.
    • Free version available.
    • Premium isn’t free.
    • Fewer tools than competitors.
    • Free lacks real-time protection.
    • Too basic for experts.
    • Sometimes false alarms.
    • Limited free support.
    Download Malwarebytes

All listed Free Antivirus

Every app we list has a verified download.

How we test Free Antivirus

Every app goes through the same four steps, and we re-check it whenever a new version ships or Microsoft changes its support dates.

  1. Source the installer

    Taken from the official developer or a GramFile-verified mirror, never third-party uploads.

  2. Scan for threats

    Checked with multiple engines, including VirusTotal, for malware, adware and bundleware.

  3. Test the install

    Installed on Windows 11 and 10.

  4. Publishing

    Listed with accurate version info, system requirements, file size, and technical info.

Read the full review process