Microsoft Security Essentials Vista for Windows

Microsoft Security Essentials offers real-time protection for your computer that protects it against viruses, spyware, or other malicious software.

Microsoft Security Essentials is an easy-to-install app with a simple interface. You can rest assured that your computer is protected with the most recent technology. The graphical interface tells you when your computer is secure. If you are green, it means that you are good. It's as simple as that.

Microsoft Security Essentials runs quietly in the background, so you can use your computer as you like it.