Microsoft Defender Antivirus, formerly known as Windows Defender, is a built-in security solution in Windows systems. Its effectiveness has improved significantly in recent years, as confirmed by independent tests .
Efficiency and test results
In the latest AV-TEST tests, Microsoft Defender received maximum scores of 6/6 in the categories of protection, performance and usability, earning the title of „Top Product” in February 2025. Similarly, AV-Comparatives gave it a protection score of 99.8% in the latest test .
Features and capabilities
Microsoft Defender offers :
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Real-time protection against malware
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Integrated firewall
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Anti-phishing protection in Microsoft Edge
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Parental control
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Ransomware protection through controlled folder
Thanks to its integration with Windows, it does not require additional installation and is regularly updated .
System performance
Although Defender runs in the background and is optimized for performance, some tests show higher resource usage during full scans compared to other antivirus programs.
User reviews
Many users appreciate the simplicity and effectiveness of Microsoft Defender as a basic protection tool. However, some note that compared to competing solutions, it may lack advanced features such as a password manager or VPN .
Summary
Microsoft Defender Antivirus provides solid basic protection for Windows users. For most users who use their computer for everyday tasks and follow basic security practices, it will be sufficient. However, for those looking for more advanced features or additional protection, it is worth considering alternatives such as Avast Free Antivirus or AVG Antivirus Free .
The final choice depends on the individual needs and preferences of the user.
