The most important thing when installing memory is to make sure you have the correct type for your computer. With the case open, located an empty memory slot and press down (gently) on the clips on either end of the slot. Line the memory with the slot, make sure it is facing the correct way. (it will only fit one way). Slide it into place and then press down. The clips will close around the notches on either end. Do not press to hard or you could damage the board.