Script Download:AddItemToStartup(PowerShell).zip
http://gallery.technet.microsoft.com/scriptcenter/Script-to-add-an-item-to-707c9ca7

This PowerShell script sample shows how to add an item to the Startup in Windows 8.

Sometimes, users want programs to start when your system starts.  Usually, you can add items to the startup folder. In Windows 8, adding items to Startup requires additional work. This script can resolve this problem.

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