The unfortunate fact about most laptops today is that they are not designed to sit on your lap or on a blanket. Laptops need air to freely circulate into and out of those cooling fans we hear. Using a laptop on your lap blocks the cooling air, your legs or clothing or blanket effectively block the flow causing much grief for the CPU. You may experience spontaneous shutdowns and shortened laptop and battery life.
An even bigger problem with putting a laptop directly on your lap is your lap is a haven for dust, lint, pet hair and even human hair. For the same reason, never put a running laptop on the floor or a blanket. This debris is readily sucked into your laptop’s hungry fans clogging fan blades and electronics heat sink fins. This debris in your laptop readily causes serous problems such as spontaneous shut down, frequent fan cycling, excessive battery drain and shortened electronics life. Any dust or debris inside your laptop is bad. How to fix the situation? First, if your laptop has been around a few months, or years, clean it internally. Look in the fans you will likely see a coating of dust. Get a small screwdriver and a compressed air source. Remove as many doors in the bottom as possible and blow the whole thing out through the fans and inlets using a jet of compressed air. You may maybe amazed at the number and size of the dust bunnies and clouds of dust that fly out of your laptop. Look inside for stubborn dust bunnies that are hiding and pull these out with tweezers.
I have seen expensive laptops that were discarded as having a terminal shutdown problem totally cured after cleaning. Next, stop using your dusty lap, blanket, carpet, or floor! Only put your laptop on a solid clean surface as the original engineers intended. Use a laptop stand such as an AirDesk to help keep your laptop fans and heatsinks clean.”