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Published on 06.25.09 by Brent Trahan

Manually Download New Microsoft Security Essentials’ Definitions

Learn how to manually download new antivirus and spyware definitions for Microsoft Security Essentials (MSE).

Manually Download Latest MSE Definitions

Note: Choose to save the definitions file when downloading it. Don’t forget where you saved it!

Install Downloaded Definitions

Windows 7, Vista

Right-click the downloaded definitions file and then select Run as administrator.

Windows XP

Simply double-click the downloaded definitions file while logged in as a user with administrative privileges.

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