Windows Security vs. Microsoft Defender: A Comprehensive Comparison
Introduction
Protecting your PC from online threats is crucial, and Windows provides two apps for this purpose: Windows Security and Microsoft Defender. While both apps share similar names, they offer distinct features and functionalities. This article aims to clarify the differences between these two apps and help you decide which one (or both) is right for you.
Windows Security: The Unified Antivirus and Protection Hub
Windows Security, previously known as Windows Defender, is the central hub for Microsoft’s basic antivirus and network protections. Similar to third-party antivirus software, it provides:
- A unified interface for managing the app and accessing manual scans.
- Separate tabs for various settings, including:
- Virus & threat protection
- Device performance & health
- Firewall & network protection
- Account protection
- App & browser control
Windows Security essentially combines multiple protection features into a single, easy-to-use interface, making it convenient to manage your PC’s security in one place.
Microsoft Defender: Enhanced Protection for Microsoft 365 Subscribers
Unlike Windows Security, the Microsoft Defender app is a separate entity that offers additional defenses against online threats for Microsoft 365 Personal or Family subscribers. It complements Windows Security and works seamlessly with either Windows Security (including the Microsoft Defender Antivirus engine) or third-party antivirus software.
Microsoft Defender’s key features include:
- Online Activity Protection: Shields your online activity from other users on the same network, ensuring privacy.
- Identity Theft Protection: Notifies you of data leaks and credit fraud, helping you protect your personal information.
- Vulnerability Detection: Monitors your devices for potential security vulnerabilities, allowing you to take proactive measures.
Previously, Microsoft Defender also included Privacy Protection, an encrypted VPN feature. However, this feature was discontinued in February 2025.
Windows Security vs. Microsoft Defender: A Side-by-Side Comparison
| Feature | Windows Security | Microsoft Defender |
|---|---|---|
| Antivirus protection | Yes, through Microsoft Defender Antivirus engine | Yes, supplements antivirus protection |
| Network protection | Yes, through Firewall | Yes, through Firewall |
| Malware scanning | Yes, manual and automatic | Yes, but additional protections |
| Privacy protection | Limited | Enhanced, including Online Activity Protection |
| Identity theft protection | Not included | Yes |
| Vulnerability monitoring | Not included | Yes |
Which App is Right for You?
The choice between Windows Security and Microsoft Defender depends on your specific needs and preferences.
- If you are already a Microsoft 365 subscriber and value enhanced protection, having both Windows Security and Microsoft Defender active is comparable to a simple third-party antivirus suite subscription, without additional cost.
- If you are not a Microsoft 365 subscriber, want additional integrated features (such as a password manager), or prefer a different interface, independent antivirus software may be a better option.
Conclusion
Windows Security and Microsoft Defender are complimentary apps that provide different levels of protection. Windows Security is the free, built-in antivirus solution, while Microsoft Defender offers enhanced protection for Microsoft 365 subscribers. By understanding the differences between these two apps, you can make an informed decision about which one is best for your needs and keep your PC secure.
