So I have this old ASUS laptop. On the back it reads X452L, Notebook. Into the main problem, I want to upgrade the storage by buying a canddy with a new HDD. However when I try to remove the DVD, the thing does not want to move, I removed the screw laying beneath the keyboard but still couldn't take it out, even with it open. I went online for solution but nothing help, no secret screws under plastic cover, no nothing. The only thing that is removable from the back is the RAM and HDD cover. Does anyone know where is the "secret" screw? Or is this DVD is non-removable?