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How can I deploy Integrated Windows Anti-virus Definition Updates?

Purpose:
You want to silently deploy Integrated Windows AV definitions for Security Essentials, Windows Defender, or System Center Endpoint Protection.

Resolution:
This can normally be done by downloading the executable file and adding the appropriate silent parameter to the package. In most cases this is -q.  

In some rare cases, like definition 1.239.494.0 which came out March 31st, 2017, no silent parameters are needed. If you do use the standard -q parameter, you’re likely to get error code -2147023257 (translated 0x80070667 in hex) which maps to ERROR_INVALID_COMMAND_LINE.

See also:
https://www.microsoft.com/en-us/security/portal/definitions/adl.aspx
https://support.microsoft.com/en-us/help/923159/how-to-manually-download-the-latest-definition-updates-for-windows-defender

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