@isopc1999a
Only editing the inf files is enough to works well on X570 + ZEN2 CPUs and don’t need to modify amdxhci.sys and amdhub3.sys.
But you must have ps/2 mouse orkeyboard to intsall the AMD chips driver first，and than install the mod usb driver.
I test on Asus X370-I and MSI X570 gaming plus, they both can work.
There are something that need to note:
1、 WIN7 install.win must include KB3033929.
2、Do not Inject the USB Driver to install.win.
3、Before you install the USB driver, you must AMD chips driver first.
If you do not do that 3 points , you will miss BOSD.
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