Manual Download Update Microsoft Security Essentials 10 September 2013


 Latest definitions
Antimalware and antispyware definitions

For antimalware and antispyware, the latest versions are: 1.157.1576.0, Sep 10, 2013 04:20 AM UTC

Use this table to download the right definitions for your computer.



Download either the 32-bit or 64-bit version depending on your version of Windows and the security software you have installed.

System requirements:
File size: 78MB
Download Here


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