Bill Bradshaw wrote:

> Every once and a while the Microsoft Malware Protection Command Line
> Utility 

This one?

  MpCmdRun.exe 

It is a cleanup tool.  You'll find it has one, or more, events defined
in Task Scheduler.  It has the following commands (with hyphen prefix):

-Scan
-Trace
-GetFiles
-RemoveDefinitions
-SignatureUpdate         <---.
-Restore                     |
-AddDynamicSignature         |
-ListAllDynamicSignature     |
-RemoveDynamicSignature      |
-EnableIntegrityService      |
-SubmitSample                |
                             |
> ... uploads ...            |
                             |
downloads -------------------'

> ... over 100 megs to this computer.

It employs a signature database as do most anti-virus programs.

https://technet.microsoft.com/en-us/library/gg131918.aspx

Run mpcmdrun (without any arguments) in a command shell to see its own
help on how to use it.

http://www.addictivetips.com/windows-tips/command-line-utility-mpcmdrun-exe-mic
rosoft-security-essentials/
http://www.windowscentral.com/how-use-windows-defender-command-prompt-windows-1
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