Microsoft still allows you to download Windows 7 SP1 ISO directly through their website. However, you need a valid product key in order to download this file. Getting the ISO file of Windows 7 is not hard if you have a valid license key. But even without a key, don't get disappointed. Your search is over. The most important thing is that you have a valid license key. Download the Windows 10 or 8.1 ISO Using the Media Creation Tool. If you've got.