I was taking my laptop apart today because I had to clean out the fans and the heat pipe between the CPU and the fan outlet, there is a thick piece of copper that connects the CPU to the heatsink that the fan blows through. And it went quite well although the heatsink assembly was tricky to get back into the laptop, but it was half blocked with dust and I managed to clean it and now it is just fine. A screw fell into the depths of the laptop whilst I was reassembling the whole thing and I had to turn it over an shake it out. Laptops are very hard and annoying to work on indeed, I managed to get it fixed though and now I am typing this on the offending laptop and it seems to be making much less noise as the poor fan is not struggling so much to carry away the heat that is blocked by all of that dust. So if your laptop is very noisy, get it checked out for dust, or do it yourself and save some money. I am still running FreeBSD 8.2 on my laptop, it works better than Linux does and it far more reliable than Ubuntu.