How do I replace my CPU heatsink fan?

In order to replace your CPU heatsink fan you need to follow a few simple directions, which are listed in this order.

Unplug the computer from any and all power
unplug the keyboard
unplug the mouse
unplug the monitor
You must be grounded - In order to ensure that you are grounded, touch the computer case before working. If you are not grounded you could have an electrically charge that you might get when you walk across carpet and then touch something metal. You may not even feel the shock, but you could be sending thousands of volts into your computer.
Purchase either Thermal Grease or a Thermal Pad, which ever your computer needs. If not specified use thermal grease.
Remove the old CUP heatsink fan – If you notice, you have thermal grease instead of a thermal pad you can remove it easily and then go to the next step.
Place the processor on a pad with pins up
Clean processor with cotton balls and rubbing alcohol
Place the processor back into your computer
Apply the thermal grease
place the heatsink fan on top of the processor
Connect the fan to the motherboard
plug in the keyboard
plug in the mouse
plug in the monitor
plug in the power

Even with these easy instructions, you should read the instructions that came with your CPU heatsink fan before installation.