Microsoft Security Essentials - New Engine release on July 15th
MSE and Forefront users should update their virus scanning engines as prompted next week.
New Antimalware Engine is planned for release on 15 July 2010
QUOTE: As part of regular update of our Antimalware technology to address the latest in the threat landscape, the Microsoft Antimalware Team is planning to release a new antimalware engine on 15 July 2010.
-- Microsoft Security Essentials (MSE)
-- Forefront Client Security (FCS)
Engine Version will be in the range of 1.1.600X.0