Since the official Intel download is no longer available, you can use these common alternatives:
The utility automates a process called "driver slipstreaming" using Microsoft's Deployment Image Servicing and Management (DISM) tool. : It requires an existing Windows 7 installation USB. intel-windows-7-usb-3-0-creator-utility-download
: It mounts the boot.wim and install.wim files from the USB and injects the necessary Intel USB 3.0 eXtensible Host Controller drivers. Since the official Intel download is no longer
: Advanced users can manually inject drivers into the Windows image using Command Prompt. This involves downloading the raw Intel USB 3.0 drivers and using DISM commands to add them to the installation media. intel-windows-7-usb-3-0-creator-utility-download
: The patched USB allows the Windows 7 installer to communicate with USB ports on newer motherboards. Alternative Methods