Download Microsoft Security Essentials Prerelease from Official Microsoft Download Center

Surface Book 3 with screen detached from keyboard

Surface Book 3

Powerhouse performance

Person using Power BI Desktop

Power BI

Transform data into actionable insights with dashboards and reports

Microsoft Security Essentials Prerelease

Important! Selecting a language below will dynamically change the complete page content to that language.

Language:
English
The Microsoft Security Essentials Prerelease program allows users to run the latest & greatest versions of Security Essentials before they are publicly available