Lay the Dell Optiplex GX260 down on a clean flat surface with the rear towards you.
Push the oval shaped buttons located on the top and bottom of the PC simultaneously and lift the case straight up.
Identify the optical drive in the case.
Remove the analog audio cable from the optical drive.
Remove the IDE cable form the optical drive by pulling straight up on the orange plastic tab..
Remove the power cable from the optical drive.
Push the two green tabs toward each other to release the optical drive and lift it out.