what have you do for usb in seven ? i have instal seven but no usb ... thanks

Hey. You need a board you can run a external USB adaptor on, then install the modded USB drivers on that.
 

you cannot install W7 direct on an Impact with USB in the install files. I ran through 2 boards to get working. 

Have you tried those one https://www.win-raid.com/t4960f52-Solution-Win-drivers-for-USB-Controllers-of-AMD-serise-mainboard-with-RYZEN-serise-CPU.html

Injecting didn’t work for me. I have full working USB with my image on all X570 boards now.