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Antimalware Engine 1.1.9103.0 was released to customers on 15 Jan 2013

Antimalware Engine 1.1.9103.0 was released to all Microsoft Security Essentials and Forefront Client Security, Forefront Endpoint Protection, Windows Intune Endpoint Protection customers on 15 Jan 2013. Signature package 1.143.0.0 is the first that contains this engine.