Quote Originally Posted by Psychonaut View Post
If the heat sink is easy to get to you may want to check how much dust as accumulated in there, some compressed air should get it out. That was the biggest issue with my laptop, a heat sink chocked full of dust, no cooling = over-heating = performance hit.
Definitely do this. If you don't feel like cracking it open, take a shopvac with a reducer/crevice tool, and suck out as much as you can.