-Enabling USB3.0 - Windows 7 Pro x86
-Installed Win7 Win2USB on a 16Gb USB-Stick on a normal way

Upgrading from USB2.0 to USB3.0 Drivers:
- booting from usb2.0 usb-port (or from USB 3.0 without driver working as USB 2.0)

-downloaded Win7-Intel(R)_USB_3.0_eXtensible_Host_Controller_Driver_5.0.4.43 (lower versions are not successful) and unzip to desktop or...
-Setup is not installing as my motherboard does meet min requirements

-- execute device Manager >double click on yellow marked USB controller >update driver>.browse my computer for driver software>let me pick from a list...>next>Have disk>Browse> ....>select iusb3hub.inf >OK> select Intel (R) USB 3.1 extensible Host controller apply....

One more device (as unidentified ) will pop up , follow the above method but except last step , where we have to select Intel (R) USB 3.0 Root Hub

-Reboot the PC

- booting from USB 3.0 port is working, too.