Dell Alienware M14x R2 (Early 2012) - Manual (Page 26)

Postrequisites
1 Follow the instructions from step 6 to step 8 in "Replacing the Optical
Drive" on page 22.
2 Replace the battery. See "Replacing the Battery" on page 18.
3 Replace the base cover. See "Replacing the Base Cover" on page 16.
4 Follow the instructions in "After Working Inside Your Computer" on page 13.
Hard Drive 28