Resetting Win 7 II

I'm unable to restore factory settings on my Dell 64bit laptop so ... I've downloaded Win7 iso from Windows 7 Direct Download Links, Official Disk Images from Digital River (http://www.heidoc.net/joomla/technology-science/microsoft/14-windows-7-direct-download-links and) created a bootable disk. I've got me Win7 key using Belarc Advisor - Free Personal PC Audit, for software, hardware and...