Microsoft Security Essentials

Microsoft Security Essentials is a security package that helps protect Windows users from spyware and other malware commonly found on the internet. Microsoft Security Essentials provides you access to Spynet, a worldwide community for reporting suspicious spyware programs, which is used by Microsoft researchers to develop updates for Microsoft Security Essentials. This program includes an automatic update feature, similar to Automatic Updates for Windows and Live Update for Symantec Endpoint Protection.

For more information or to download this software, please visit the:

For Windows 7, Windows Vista: Microsoft Security Essentials site.

For Windows 8, the package is named "Windows Defender" and is included in Windows 8 by default.