johngalt

What has probably happened is that the dust has clogged the radiator fins around the CPU - this is a problem with laptops that have been used for over 2 years, or less time in high dust environments, and the only way to remove that is to take them apart so they radiators can be efficiently cleaned.

If you are not comfortable taking a laptop apart (and they are very delicate pieces of equipment - even though I take them apart all the time it is not something I would recommend even for someone with advanced skills - it takes a good amount of know how and experience to figure out what comes out, what doesn't and how it all fits back together without breaking it all) I'd recommend taking it to a shop that can do it for you and get it cleaned out. If I were to tell you I can do it, great, but not everyone who *says* they can do it really *can* do it, so be very very pixky about who you let open it up.