Installing a cd-rom is a rather simple process. First shut down the computer and remove the power cord. Open the case and select which bay (slot) you want to place your cd-rom. On the front of the case are slots, remove the one where the cd-rom will sit. Slide the cd-rom through the from of the computer until the holes line up on the bays. Anchor in place with screws. Connect the cable (ribbon or sata) to the motherboard and connect a power adapter (white cable with multi-colored wires) to the cd-rom. close the case, connect the power cord and power it up.