With the panel removed, we get our first glimpse to the inner workings. Note the bay for the second hard drive in the lower left-hand corner, and the existing system drive in the lower right-hand corner. The black arrows indicate the two screws to remove, allowing you to pull the drive out of the unit by grasping the black plastic tab and gently pulling to the left. Remove the WLAN card in the upper left-hand corner by removing the two screws indicated by the red arrow. Note the order of the antenna cables. Remove the three RAM modules, the fourth is on the other side of the motherboard.