Assuming it's the same Matisse USB controller as on previous X370 and X470 boards, this article may be of help:

https://www.overclock.net/threads/gu...-x470.1731246/

I know you did say blah blah install Windows 10, but you really should. Incompatibility issues like this are only going to get worse and Windows 7 has been unsupported in any way for nearly a year and a half now.