ATmega16U2 DFU driver on Windows 11 (03EB:2FEF): Atmel FLIP vs dfu-programmer, and the “Could not find a Java Virtual Machine” fix
When an Arduino UNO R3 or Mega 2560 R3 shows up as “ATmega16u2 DFU” or “Arduino Uno DFU” with a yellow triangle, its USB…