Windows Defender is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it"s detected and minimizes interruptions and helps you stay productive. Now with 2 free support incidents for Windows XP and Windows Server 2003.
Note: This download is available to customers running genuine Microsoft Windows. Windows Vista users must pass Microsoft Genuine validation requirements to enable certain product features and to obtain non-security updates and product support from Microsoft. For more information, go to the Windows Genuine Advantage FAQ.