There is a small metal clip that you must remove from the plastic notch on the CPU socket. You have to press down on it and then pull out. You might try a screw driver to help push down on the clip (be <i>very</i> careful). Wear static protection before working inside your PC. You can get static wrist wraps at Radio Shack or some store like it.
To remove the CPU, just lift the little lever on the side of the ZIF socket. It's called a ZIF (Zero-Insertion-Force) lever, because it removes the CPU without the use of force.
If I were you I would not even think about overclocking though, if you don't know how to remove the heatsink (no offense). Start by learning the basics, and get <i>really</i> familiar with hardware before trying the dangerous stuff, OK?
:wink: :cool: :wink: :cool: :wink: :cool: :wink: :cool:
:smile: <b><font color=green> Have a day </font color=green></b> :smile: