Turn the laptop back upright and open the lid

Using a guitar pick, release the plastic retaining clips that hold the bottom of the case on.

Release the areas marked with green first, then the yellow and last the orange.

Close the lid and turn the unit upside down again.

The bottom cover should now be free, lift the front part first and push the cover toward the hinges.

If the cover resists make sure you have removed all the bottom screws including the two hidden under stickers.