It's hot, and the CPU of i7 laptop playing online games is very hot.

I'm sure your computer didn't clean the dust, did it? Dust blocked the ventilation duct, so the heat could not be discharged. You are playing games, increasing the CPU load. Of course, the heat will be large, and then the dust will block the air duct and the heat will not be discharged. Of course the temperature will be high. Clean the dust and replace the silicone grease. Winter is still quite summer. If you still do this, you will definitely crash frequently. Let's share the lessons of the past.