I bought an Atmel AVR ISPMKII programmer in 2003 to program the Attiny13 board I made for a project. The Attiny13 spare board was put to use for a new project recently, but I ran into issues with programming using the Arduino IDE. No drivers of AVR ISPMKII for Windows 11. I read various postings in the forum where this issue was raised, but couldn't get the programmer to work.
I installed the Microchip IDE, although there is no support for AVR ISPMKII, but it installs USB drivers for its development tools. When I plugged the AVR ISPMKII, it came up in the Device Manager as Microchip Tools > AVRISP MKII. I installed the MicroCore library and put the programmer to the test. Now, I can burn the bootloader and upload to my Attiny13 board with AVR ISP MII + Arduino IDE. I hope you find this useful if you have had similar issues with your Atmel AVR ISPMKII, and give it a new life
Thanks for taking the time to share your findings @vdtech!
For anyone who experiences this problem and doesn't have a need for "Microchip IDE" for any purpose other than the drivers, a more "lightweight" solution will be to use the Zadig driver installation tool to install the libusbK driver for the AVRISP MKII programmer:
