Microsoft Security Essentials

Microsoft Security Essentials Microsoft Corporation - (Freeware) Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software.  Security Essentials 2.1.1116 Vista 64-bit - Download  Security Essentials 2.1.1116 Vista - Download  Security Essentials 2.1.1116 XP - Download