1. Security Essentials 1.0.1961 XP Released: 28 Feb 2010 (4 years 7 months ago) Technical Details | Change Log
  2. Security Essentials 1.0.1959 XP Released: 19 Feb 2010 (4 years 8 months ago) Technical Details | Change Log
  3. Security Essentials 1.0.1611 XP Released: 30 Sep 2009 (5 years ago) Technical Details | Change Log