Get Microsoft Security Essentials for a PC running Windows 7 or Windows Vista
Windows 7, Windows Vista
Windows 8, Windows RT, Windows 8.1, Windows RT 8.1, Windows 10
Real-time protection against spyware, viruses, rootkits, and other malicious software
Online system scanning and cleaning
Dynamic signature service
Offline system scanning and cleaning
Enhanced protection against rootkits and bootkits
Windows Defender for Windows 8, Windows RT, Windows 8.1, Windows RT 8.1, and Windows 10 provides built-in protection against malware. You can't use Microsoft Security Essentials, but you don't need to—Windows Defender is already included and ready to go. But if you’re looking to protect a PC with an older version of Windows, you can use Microsoft Security Essentials to help guard against viruses, spyware, and other malicious software. It provides free* real-time protection for your home or small business PCs.
Note: Windows Defender is also available in earlier versions of Windows. However, in earlier versions Windows Defender only provides protection against spyware. In the last versions of Windows, Windows Defender provides full malware protection for your PC. Malware consists of viruses, spyware, and other potentially unwanted software.
* Internet access fees may apply while downloading. | Microsoft Security Essentials Privacy Statement | Microsoft Security Essentials License Agreement
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