Microsoft Defender is a new cross-device app that helps people and families stay safer online. Microsoft Defender adds new features and a simplified user interface. Microsoft Defender also brings valuable device protection to iOS, Android, Windows and Mac, with malware protection, web protection, real-time security notifications and security tips. Microsoft Defender is available in the Apple, Google and Microsoft app stores and requires a Microsoft 365 Personal or Family subscription to use.
Windows Security, formerly known as Windows Defender Security Centre, is built-in security on Windows PCs to protect your device and data. Windows Security is pre-installed and automatically enabled. Windows Security includes Microsoft Defender Antivirus software that protects your Windows device and data against viruses, ransomware, trojans and other malware unless non-Microsoft Antivirus software is active.