# AVRISP MKII not working , even with zadig2.9 WinUSB (v6.1.7600.16385) **URL:** \ **Category:** Uploading\ **Created:** [November 4, 2024, 2:51am UTC](https://forum.arduino.cc/t/avrisp-mkii-not-working-even-with-zadig2-9-winusb-v6-1-7600-16385/1318296 "2024-11-04T02:51:36Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![ptillisch](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@ptillisch](https://forum.arduino.cc/u/ptillisch)\ **Post date:** [November 4, 2024, 4:22am UTC](https://forum.arduino.cc/t/avrisp-mkii-not-working-even-with-zadig2-9-winusb-v6-1-7600-16385/1318296/2 "2024-11-04T04:22:49Z")
Hi @ajawamnet1. This error can be caused by using an " **AVRISP mkII**" driver that is not compatible with the [" **AVRDUDE**" tool](https://github.com/avrdudes/avrdude/) used by Arduino IDE for this operation. My recommendation is to switch to using the [" **libusbK**" driver](https://github.com/mcuee/libusbk). You can do that easily with the " **Zadig**" driver installation tool: 1. Connect the " **AVRISP mkII**" programmer to your computer with a USB cable. 2. Download Zadig: [http://zadig.akeo.ie/](http://zadig.akeo.ie/) 3. Run the downloaded file. 4. Select " **AVRISP mkII**" from the dropdown menu in the " **Zadig**" window. If it doesn't show up on the menu, then select **Options \> List all devices** from the menus in Zadig and check again. 5. Click the **▴** button to the right of the " **Driver**" selection field until you see " **libusbK**". 6. Click the " **Replace Driver**" button. An " **Installing Driver...**" dialog will now open. 7. Wait for the driver installation process to finish. 8. Click the " **Close**" button in the " **Driver Installation**" dialog. The dialog will close. 9. Close the " **Zadig**" window. --- _[View the full topic](https://forum.arduino.cc/t/avrisp-mkii-not-working-even-with-zadig2-9-winusb-v6-1-7600-16385/1318296)._