An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
For most home use, Microsoft Defender is enough, and an additional third-party antivirus is generally not necessary.
What Defender includes depends on which "Defender" is meant:
- Windows Security / Microsoft Defender Antivirus is built into Windows 10 and 11 and provides real-time protection against viruses, ransomware, spyware, and other malware.
- Microsoft Defender app is included with Microsoft 365 Personal or Family and adds cross-device protection features such as malware protection, web protection, real-time security notifications, and security tips across Windows, Mac, Android, and iOS.
Compared with Norton:
- For core antivirus protection, Microsoft Defender is generally sufficient for a typical home PC.
- Microsoft recommends not running another antivirus or antispyware product at the same time as Windows Defender because multiple real-time security products can affect performance and can cause install or update errors such as 0x80070643.
- Microsoft Defender for individuals also includes identity theft monitoring for Microsoft 365 Personal/Family subscribers, with credit monitoring, expert recommendations, restoration support, and identity theft insurance in supported scenarios.
About the extra Norton-style features mentioned:
- The context supports identity theft monitoring and related protection features in Microsoft Defender for individuals.
- The context does not show Microsoft Defender including driver cleanup or password monitor as equivalent built-in features.
- The privacy protection (VPN) feature in Microsoft Defender for individuals is being removed, with end of support on February 28, 2025. Device protection, identity theft monitoring, and credit monitoring continue.
Practical takeaway:
- If the goal is strong built-in malware protection on Windows, Defender is enough for most home users.
- If a Microsoft 365 Personal or Family subscription is active, the Microsoft Defender app adds broader personal/family protection features.
- If specific extras such as driver cleanup or a password monitoring feature are the deciding factor, the available information here does not show Defender matching Norton feature-for-feature.
- If switching, avoid keeping Norton and Defender real-time protection active together. Uninstall the previous security software first.
References:
- Getting started with Microsoft Defender
- Antivirus and antimalware software: FAQ
- National Public Data breach: What you need to know
- End of support-Privacy protection (VPN) in Microsoft Defender for individuals
- Whats new in Windows Security
- Microsoft Defender - is additional protection needed? - Microsoft Q&A
- third party anti virus products - Microsoft Q&A