Microsoft Security Essentials 1.0.1961.0
Microsoft Security Essentials (Morro) provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software.
Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure  when you’re green, you’re good. It’s that simple.
Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you wantâ€â€without interruptions or long computer wait times.
Key Features
• Comprehensive malware protection
• Simple, free download
• Automatic updates
• Easy to use
Runs on Windows XP 32â€Âbit, Windows Vista/Windows 7 32â€Âbit, Windows Vista/Windows 7 64â€Âbit.
Download: Microsoft Security Essentials for Windows XP, Vista and Windows 7 1.0.1961.0