I have a Dell Inspiron 8600 that is a few years old. One problem that I've had ever since I bought it is that when I turn it on, it will run great for 5 minutes or so and then the fan will kick in and everything will slow down to a crawl. When the fan cools the laptop down enough it speeds back up again, however it doesn't perform nearly as well as it did before the fan turned on. Even if it isn't hot. Is there anything I can do?