Microsoft Security Essentials 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 a Microsoft free download that you can install and use. It is easy to use and keeps your computer protected with the most recent technology. It is easy to determine if your computer is secure. If you are green, you are good. It's as simple as that.

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