here is the way i did it on my computer: first off, the heatsink only fits well in one direction, with the ledge on the heatsink not over the chip and over the base of the ZIF socket instead. then make sure that the lip side of the clip (where you put your screwdriver head to push the clip down) is on the same side as the ledge of your heatsink. make sure you don't push down directly on the heatsink and that all of your force is directed to the screwdriver that is pushing the clip down. also do NOT listen to the instruction booklet included with your manual with respect to your fan: put your fan on the heatsink before you mount the heatsink on the chip. i don't know why they recommend this--this is stupid and increases the chances of you accidently busting your chip.