Libusb Installation

Download https://technical.swissmicros.com/tools/libusb-win32-install-1.2.6.0.zip and extract somewhere.

Now navigate to the libusb-win32-install-1.2.6.0 directory and run inf-wizard.exe as administrator.

It is possible (depending on your security settings) you will need to confirm the access control.

First screen of inf-wizard instruct you to connect your USB device.

You have to initiate the device into bootloader mode using PGM and RESET buttons:
Press and hold PGM button, then press RESET and release PGM button
(see Bootloader mode activation for more details).

Now you can connect it to the USB and press [ Next> ].

Select STM32 BOOTLOADER device from the list and press [ Next> ].

Just check you have selected correct device and press [ Next> ].

Save generated .inf file. You don’t have to do anything special with this file if you proceed with automatic installation in the next step.

Start driver installation by pressing [ Install Now... ].

Just look at the nice progressbar…​

Hopefully the installation completes without error.

You can check successful installation of the USB driver by looking into device manager at libusb-win32 devices. STM32 BOOTLOADER should be listed there (as can be seen in next image).