Script Download: EnableSmartScreen(PowerShell).zip
http://gallery.technet.microsoft.com/scriptcenter/Script-to-enable-9076d20e

This PowerShell script shows how to enable SmartScreen in Windows 8.

Some of users want to use script to enable SmartScreen in Windows 8 due to some automation tasks. This script can help user to enable SmartScreen via script on multiple computers. 

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You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery