First we need to unscrew the fan from before we can remove it.

Remove both copper colored 10mm screws with a #2 phillips screwdriver.

As you remove the second screw, pull the fan inward to remove it from the remainder of the case. It should now only be connected to the case through a cable attached to the circuit board.

The disk drive is removed in the pictures, however this is not necessary to replace the fan and can be ignored.