go to google and search for speedfan
the first result, clocik ,download, install. It lets you see temperatures and ajust fan speeds. If the temps say you are overheating you can get a fan tray, you basically plug it into a usb slot, put it under your laptop and it blows air onto it.
Also, if it isn;t under warrenty, take the keyboard off (or back if it has that entry) and clean it out, any dust/gunk in there will heat it up alot and reduce air flow