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.

This is the most current release of Windows Defender. If Windows Defender informed you that an update is available, you are running an older version. We encourage you to upgrade to this version. You can check your version of Windows Defender by clicking the down arrow next to the help icon and choosing ?About Windows Defender?.

Windows Defender

Windows Defender x64