I want you to perform the following steps to eliminate the heating problem:
First of all check your cooling fan if it is working properly and observe the sound. Then use aerosol duster to clean the heatsink. After that place your notebook computer onto a smooth horizontal surface and observe the difference in tempeerature for 90 minutes. Even if that doesnt work use the included dell utilities or drivers cd or support.dell.com to run a complete computer diagnosis with the instructions given there and see if the problem gets solved. Now here is the plan B if none of these methods work and you dont want to heat up you inspiron 8500 then i would recommend you buying a notebook cool pad or chill pad with at least two to three fans. Even though i just purchased a new inspiron 8600 i use a cool pad myself for only gaming when the notebook really gets hot. Being a professional gamer i know that the heat is the enemy and affects many other computer components and therefore i always pay attention to the cooling system. When you will use one you will be amazed to see the results and it doesnt consume much power as well but make it sure that the size of the cooling pad matches the notebook size. Buy a noiseless cooling pad with medium sized fans and high base and structure. It wont cost you much but i assure that it will take care of all your notebook heating problems dude if you plug it in usb and let it go all the time as it is noiseless. For any further questions please e-mail me at firstname.lastname@example.org. I would me more than happy to answer your questions.
David, to answer your question of "how do I do it", there are two screws on the bottom of the fan module. The fan module is the square plate on the back-left corner of the bottom (if the laptop is sitting in normal user position). There are four obvious ventilation slots in the module, and one of the rubber feet is attached to it. There's also an obvious thumb indentation (like on a dictionary) by the module. (If that doesn't identify it clearly, nothing will!) Use a small phillips screwdriver to remove the two screws - they're about 1/2" (1.25cm) long, and may get hung in the fan module - go ahead and remove them all the way. Stick your finger or thumb in the indentation, and lift the module from there, then remove it. The cooling fins are at the back of the machine in the hole where the fan was. Blow with canned air (available at just about any computer store, or even at Target or WalMart) through the cooling fins and out the back of the machine. If you've never cleaned the fins before, you'll probably get a very satisfying plume of dust. Then use the canned air to blow the caked-up dust off of the fan blades. Hold the fan stationary as you blow the blades off - you can destroy it by spinning it too fast with the canned air. Carefully blow out any dust bunnies you can see inside the machine, or use a toothpick to snag them if necessary. Be careful not to abuse any of the components inside the machine with the toothpick. To reinstall the fan, insert the two tabs at the back edge of the hole, and pivot it into position. Reinstall the two screws, and you're done!
You can also remove the keyboard for a thorough cleaning, but that's a lot more involved. Good directions here:
I clean the cooling fins about once a month or six weeks, and remove the keyboard for a good blow-out about twice a year. Probably a bit more than absolutely necessary, but I hate heat!
Gleni85002.2GHz P4m512Mb RAMNvidia GeForce 5650 with modEschew misoneism.