Microsoft Defender Antivirus

Native Windows antivirus protection built directly into the operating system.

Microsoft Defender Antivirus offers free, integrated malware protection for Windows environments, making it suitable for users needing basic security without third-party solutions.

Security & Antivirus
4.6(4.5K reviews)
6alternatives
Free
4/10
Value
5/10
Ease of Use
5/10
Features
4/10
Support
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AppAlter VerdictEditorial Decision Guide for Microsoft Defender Antivirus
✓ Verified Lab BenchmarkAV-TEST Windows 11 (2026-02)
View official lab report ↗
Protection Rate
99.3%
False Positives
3
Performance
5/6.0
Idle Memory
140 MB
The Verdict: Microsoft Defender Antivirus offers free, integrated malware protection for Windows environments, making it suitable for users needing basic security without third-party solutions.

Best Suited For

Individual users seeking basic antivirus protectionSmall businesses with minimal security needs

Consider Alternatives If

Enterprises needing comprehensive security solutionsUsers requiring support for multiple operating systems

Factors to Watch Out For (Potential Dealbreakers & Pricing Notes)

  • Dealbreaker: Not suitable for organizations requiring advanced security features like centralized management or extensive reporting
  • Pricing Note: Potential costs for upgrading to Microsoft 365 for additional security features