Hi guys i got an arduino nano from one of my friends.
im pretty sure its not a genuine it has that CH340G thing on it.
he has many working ones of the same thing.
When i plugged it to my laptop which i have programmed Arduino UNOs before.
i changed the com port and the board type.the computer also makes the sound when i plug and remove the USB cable connected to the nano.
but the blink program doesnt upload to the board please help
But did you actually install the driver? Windows making that sound only tells you connected something, not that it's working. 
Site of the manufacturer/driver: CH341SER.EXE - 南京沁恒微电子股份有限公司