Windows › Free Antivirus

Best Free Antivirus for Windows - 2026

5 apps reviewed
100% free to download
Virus-scanned & verified safe
Updated May 23, 2026
#1
Microsoft Defender Logo

Microsoft Defender

Built-in Windows shield stopping online threats.

Free By: Microsoft
Pros
  • Free & Built-in
  • Real-time Defense
  • Always Updated
  • Firewall Shield
  • Simple to Use
Cons
  • Limited Features
  • Tech Savvy Needed (Maybe)
  • False Positives Possible
Download | Full Review
#2
Bitdefender Antivirus Free Logo

Bitdefender Antivirus Free

Free, basic shield against ever-changing cyber threats.

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

Avira Free Security

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

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

Kaspersky Free Antivirus

Offers basic protection against common threats for your devices.

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

Malwarebytes

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

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