Use Microsoft Security Essentials to help guard against viruses, spyware, and other malicious software. It provides real-time protection for your home or small business PCs.
Microsoft Security Essentials is free* and we designed it to be simple to install and easy to use. It runs quietly and efficiently in the background so you don't have to worry about interruptions or making updates.
Comprehensive malware protection Supports Windows 7, Windows Vista, and Windows XP Available in 33 languages Simple, free* download Protects you quietly in the background Automatic updates
Microsoft Security Essentials is available for small businesses with up to 10 PCs. If your business has more than 10 PCs, you can help protect them with Microsoft System Center 2012 Endpoint Protection .
* Internet access fees may apply while downloading. Your PC must run genuine Windows to install Microsoft Security Essentials. | Microsoft Security Essentials Privacy Statement | Microsoft Security Essentials License Agreement
Get more information on Microsoft Security Essentials.
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