Best PC Protection

Microsoft Defender Antivirus

A practical guide to built-in Windows protection before purchasing additional software

WindowsFree PlanReal-Time Protection

Microsoft Defender Antivirus is worth evaluating for built-in Windows protection before purchasing additional software. This review explains package boundaries and practical buying questions, without claiming new hands-on testing or a guaranteed detection rate.

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7.6
overall score
Included with Windows
Price
Included with Windows
Platforms
Windows
Best for
Home
Support
Microsoft support documentation and community forums
Protection Rate97%

The displayed score is an editorial rating, not a new measured detection percentage. Judge protection using dated, independent tests for the specific operating system and product version. No security product detects every threat.

Performance Impact99%

Scan speed and background load depend on hardware, files and settings. Try normal browsing, video calls and a scheduled scan on your own device before committing. This review does not claim a comparative performance benchmark.

Pros
✓No separate antivirus subscription for the built-in component
✓Already integrated into supported Windows installations
✓Dashboard places common security controls together
✓Works alongside normal Windows updates
✓Useful baseline before buying additional software
Cons
–Built-in antivirus is for Windows
–No bundled consumer VPN in this component
–Does not replace backups or account security
–Other Microsoft Defender services are separate offerings
–Business requirements may exceed the consumer baseline
Features

Microsoft Defender Antivirus is part of Windows Security on supported Windows devices. It provides a useful baseline without a separate antivirus subscription. It should not be confused with every service carrying the Microsoft Defender name, including separate subscription offerings. A household needing protection on other operating systems must assess those devices individually.

Built-in Windows antivirus
Windows Security dashboard
Real-time malware protection
Scan controls
Integration with Windows security settings
Pricing

The built-in Windows antivirus does not require a separate subscription. Optional Microsoft services are separate purchases.

UI / UX

Review scan controls, notification settings and account access during setup. Enable automatic updates and keep a record of subscription and recovery details.

Compare with
Microsoft Defender Antivirus vs Norton 360 Deluxe →
JV
Reviewed by
Jordan Voss · Editor-in-Chief, Security Testing
Frequently asked questions
Consider it if you need built-in Windows protection before purchasing additional software. Compare its exact package with your existing tools and supported devices before deciding. The best fit depends on coverage and practical use, rather than the longest feature list.