Windows Defender is a free program that helps you stay productive by protecting your computer against pop-ups, slow performance and security threats caused by spyware and other potentially unwanted software.

The worldwide SpyNet community plays a key role in determining which suspicious programs are classified as spyware. Microsoft researchers quickly develop methods to counteract these threats, which are automatically downloaded to your PC, so you stay up-to-date.

This latest version of Windows Defender offers a new scanning engine for enhanced performance, simplified user interface and alerts, and support for 64-bit platforms. This product is free of charge for licensed Windows customers. Users of 64-bit platforms should use WindowsDefenderX64.msi.