@samwelmhilu identifying a computer should not be this difficult. There is usually a label on the bottom side that will tell you what computer you have. Anyhow, we just have to assume that your computer is a HP Pavilion dv2000.
Use the [document|41265] page 191 to remove and clean your fan/heatsink assembly. Once you are done with either replacing or cleaning it, you do want to go ahead and apply new thermal paste. Here is a generaic guide on how to do that [guide|744]