lol, just did mine. IT WAS REALLY ANNOYING. the heatsink and fan didnt have that much dust in them but the thermal paste was like it patches cleaned replaced it. stuggled to get heatsink back on. THE SCREWS ARE ON THE UNDERSIDE
. put it in (heard horrible graunchy noise) and hit the power button and here i am
. i will post some temperature stuffs if its actually affected that.