Script Download: SetShortcutKeyForOneNote(PowerShell).zip
http://gallery.technet.microsoft.com/How-to-change-the-OneNote-09f269b6 

This PowerShell script sample shows how to change the OneNote screen capturing shortcut key in Windows 8.1

New in Windows 8.1, Windows + S brings up a Search experience designed to help users find things more quickly from any application. We know how useful the old Windows + S shortcut key is in OneNote, so this script can provide a workaround in the meantime, it can help you custom a shortcut key for OneNote screen.

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