You can use Microsoft OS Descriptors to automatically load winusb driver.
Please refer to section ' Automatic installation of WinUSB without an INF file' in the below link:
You can also refer to Microsoft OS Descriptors for USB Devices - Windows drivers | Microsoft Docs
Note: The above method can be used only if FX3 has boot mode other than USB Boot OR if USB Boot is
used, then second stage bootloader should be used to implement the above (because FX3 ROM bootloader
cannot be made to bind to WinUSB by using above method)