You have to perform routine maintenance on any computer, and especially laptops because of the smaller internal space fro air to move around. Routine cleaning maintenance involving using "canned" compressed air directed into the vents located on the sides/bottom of most laptop computers. If maintenance isn't done about every three months or so, the buildup of dust/dirt on the fan blades and in corners can be difficult, if not impossible, to remove.
If this happens, the computer can easily overheat and shut itself down. If that is the case, the cover will have to be removed in order to physically reach the area where the fan is located. If you don't have the correct tools and lots of patience, this is a job best left to someone familiar with the disassembly of a laptop.
Either find a friend who knows how to do this, or pay a local computer repair shop to perform the cleaning. There are YouTube videos that can be used as a tutor if you want to take a try at your own maintenance. If you do this maintenance every few months, you should never have to take the laptop apart.
My laptop is 3 years old and I've never had to open it up for cleaning. Five minutes is all it takes to spray compressed air into the vents and give the keyboard and screen a cleaning with a soft micro soft cloth that has been dampened with water. These cleaning are especially important if you have pets in the house.
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