1. Download your patches to a folder You could always download the patches from the following link http://catalog.update.microsoft.com/v7/site/Install.aspx?referringpage=Home.aspx and save them to a local folder or automate it by the following process
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Read the complete post at http://scug.be/blogs/sccm/archive/2011/07/27/windows-7-osd-deployment-sccm-or-mdt-and-starting-with-a-patched-media-more-secure-amp-saves-time.aspx