I am using an Arduino Mega 2560 board for my project. Whenever I power it up the digital pin13 toggles twice which is connected to the board led. My hardware is ready and i have used the pin 13 in my project also. Whenever power is given to the Mega2560 this pin toggles twice. I want to remove this toggling, because it will affect my project. Is this related to bootloader then can anyone please provide me bootloader for non toggling pin 13.