Legacy versions of Windows 7 do not include native drivers for the xHCI (Extensible Host Controller Interface) used by USB 3.0 ports.
Windows 7 does not natively support USB 3.0 (xHCI). On newer hardware (starting with Intel 100 Series/Skylake chipsets), USB ports often fail to work during the installation process unless the drivers are "slipped" into the installation media beforehand. windows 7 usb 30 creator utility intel download center top
Ensure your BIOS is set to Legacy Boot (or CSM enabled) and Secure Boot is OFF . Also, try using a USB 2.0 port for the installation after drivers are injected (ironically, injected drivers sometimes fail on 3.0 ports during the first reboot). Legacy versions of Windows 7 do not include
