Download the latest updates or definitions for your Microsoft Windows Defender security software
More about Microsoft Windows Defender Update
This package will help you install the latest Windows Defender definition updates. 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. Learn more.