: While not a full ISO source, it remains the official repository for individual security patches (like KB3125574) needed to update an existing installation. OEM Recovery Media
Even if you find a clean "Index Of" source for the ISO, Windows 7 is not free software. You will still need a valid to activate the operating system. Many users find their original keys on stickers (COA) attached to the bottom of old laptops or the side of desktop towers. Index Of Windows 7 Iso