Use the flat end of a spudger or an opening pick to pry up the back cover.

On laptops with extra tight back covers, a suction handle is a useful tool to help create a gap big enough to insert an opening pick.

Work your way around the whole perimeter of the laptop, twisting your tool as you go to unclip the back cover.

Most laptops use plastic clips in conjunction with screws to keep the back cover secured in place.