Download Windows 7 ISO – Official Direct Download Links

 "There are many valid and legal reasons one might have to feel the need to download Windows 7. For instance, you might be needed to reinstall or recover Windows 7 but not find the original Windows 7 setup DVD, or your netbook doesn’t come with a DVD drive. In such cases, downloading Windows 7 should help you out, assuming you have bought a legal and valid key from Microsoft."

http://techpp.com/2009/11/11/download-windows-7-iso-official-direct-download-links/