I thought I expressed a valid opinion. Are you actually having lockups? If not, I wouldn't worry about it. Laptops are designed to run hot. Most likely your laptop will last longer than you will want to use it, anyways. Unless this helps the battery last longer, most people I know that have owned laptops regularly it's the battery that determines the life of the laptop. When the laptop gets old enough that it is no longer worth replacing the battery or the battery can no longer be obtained, then its end of life. It doesn't seem likely to me that cooling the laptop will extend its life. There may be some particular models that are exceptions to this, maybe you have one of them. However, I would think that if heat is an issue with a particular model laptop it will be enough of an issue to have lockups. So again, are you experiencing lockups?