Latest official Daz loader to date, of this torrent, is included. Or use your own key. These are genuine UNTOUCHED ISOs! Great version for you if you don't do a lot of networking or use BitLocker and all that kinda stuff

Keep a look out for my SP1 Integrated Untouched

Various web-based online storefronts and retailers (e.g. Digital River) sell Windows 7 licenses, and to fulfill the orders, the online stores host and provide digital downloads of Windows 7 setup installation files in the form of ISO image, which can then be unpacked and extracted, or used to mount on virtual drive and burnt to a DVD media disc to clean install Windows 7 on a blank PC or upgrade a system from existing operating system
Enjoy