Assuming all is well with a fan in a laptop, how hot a laptop gets depends on what it is doing, and whether it has a mechanical hard disk drive (HDD), or a solid state disk (SSD) which runs cooler. Any computer can be busy doing something, even when you are not using it, and therefore generating heat. It is normal for a laptop to get warm/hot. A laptop is not designed for use on a lap! It should be used on a hard surface to allow the air to circulate. Apple Macs switch off when they get too hot, but PCs need a fire warden!