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This document explains how to switch the driver to one that the Arduino tool chain will work with.ġ) We downloaded the latest release (1.2.6.0) of libusb-win32 from  but the latest release can be found here Ģ) Unpack the libusb zip and run the inf-wizard.exe in the bin folder AS ADMINISTRATORģ) Select the avrisp mkII from the list that appears when you run inf-wizard then click next through the wizard.Ĥ) When prompted select a place on your pc to save the. The error will often be:- avrdude: usbdev_open()Ītmel changed the usb driver they install to Jungo which doesn't work with the Arduino Ide and therfore with Visual Micro

The problem usually happens after installing Atmel Studio.

This document solves usb driver errors for Arduino programmers.