In the Zadig menu, click on Options and check List All Devices .
For 64-bit systems, "libusb" typically refers to two distinct paths: the modern cross-platform library or the legacy libusb-win32 port. On 64-bit Windows, you don't just install a library; you often need to swap the device's kernel driver to one libusb can talk to. 1. Modern libusb (libusb-1.0) libusb driver 64 bit
Your 64-bit software (e.g., 3D printer software, SDR radio controllers, flashing tools). In the Zadig menu, click on Options and
The modern, actively maintained standard supporting synchronous and asynchronous transfers. Click Replace Driver or Install Driver
Click Replace Driver or Install Driver . Zadig will automatically handle the 64-bit self-signing certificate generation and install the driver safely. Method 2: Manual INF Installation
+--------------------------------------------+ | User Application (64-bit) | +--------------------------------------------+ | libusb-1.0 API (libusb-1.0.dll) | +--------------------------------------------+ | OS Driver Backend (WinUSB, UsbDk, etc.) | +--------------------------------------------+ | USB Hardware Device | +--------------------------------------------+ Supported Backends for Windows 64-bit