Did you try to press BOOT0 and keep while for short time pres RESET?
I miss this step and no device was visible in device manager in WIN10.
I found this trick, but I moved to another computer with Ubuntu, compile blink and program with dfu-util.
But no blinking was visible. Now I back to Windows computer and Unknow device is visible in Win Device Manager
Zadig software still don’t see the board on the list