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Protection for your PC . Windows Defender is built into the latest versions of Windows and helps guard your PC against viruses and other malware. For a PC running an older version of Windows 7, you can download Microsoft Security Essentials for the low, low price of free. What's included
Windows Defender Antivirus. Keep your PC safe with trusted antivirus protection built-in to Windows 10. Windows Defender Antivirus delivers comprehensive, ongoing and real-time protection against software threats like viruses, malware and spyware across email, apps, the cloud and the web.
If you’re running Windows 10, Windows 8.1, or Windows 8, you’ve already got Windows Defender built in, helping to protect you against viruses, spyware, and other malware.. Malware consists of viruses, spyware and other potentially unwanted software. Windows Defender is free and is included in Windows, always on and always working to protect your PC against malware.
Microsoft Security Essentials runs quietly and efficiently in the background so you’re free to use your Windows-based PC the way you want—without interruptions or long computer wait times. Before installing Microsoft Security Essentials, we recommend that you uninstall other antivirus software already running on your PC.
Windows Defender Antivirus includes: Cloud-delivered protection for near-instant detection and blocking of new and emerging threats. Along with machine learning and the Intelligent Security Graph, cloud-delivered protection is part of the next-gen technologies that power Windows Defender Antivirus.