I posted this on another thread similar to yours. Sometimes searching for your problem in the forums will give you answers, but so it's easy to find I'll just copy and paste what I said on that thread.
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I don't know how handy you are with computers, but personally I have taken laptops apart and addressed some issues... I'll list a few that can help reduce temps.
Hardware:
1. change the thermal paste on the CPU and GPU with a high quality aftermarket paste, make sure not to use too much a thin even application is key to good heat transfer
2. while you have the laptop open use pressurized air to clean out the fans and heat sinks, any dust causes resistance to airflow and hurts cooling performance
3. if you are using a standard hard drive, switch to an SSD, they use less power and generate less heat inside of the laptop's body (this is minimal for changing heat level but helps A LOT with noise and perceived computer speed or quickness)
Software:
1. use aggressive fan profiles on software or in the bios, if performance is what you need and noise doesn't matter, set the fans higher
2. undervolt/down clock both the CPU and GPU. I'm not saying you should try to crank them up, but realize that if you run something at stock and it throttles, you get less performance than if you just underclock/undervolt it by a little bit, yes on paper it will look slower but throttling hurts performance more than just running it at a slower speed to start with, you might also be able to lower the voltage without changing the stock speeds so give that a try
Use guides please! If your not comfortable doing the more hands on/opening stuff up options, try some of the easy software ones first. Always start with the easiest option with the lowest entry for effort/risk!
In my own experience I have done all of these things to one of my old laptops and it runs better now 7 years later than it did when it was new after I did some research. If you want an order to try them out, first thing is just to get a can of air and blow air into the fan vents so it expels dust out the heat vents. Canned air is like $3 a can and very cheap. Do not tilt the can, keep it upright and give the PC some time to dry in case you accidentally tilt the can, this can produce moisture. Next try setting more aggressive fan profiles, then try feeding the CPU or GPU less voltage (small increments on CPU voltage look this up) or lower the clocks by a small amount (for GPU set the TDP or clocks 5% lower and see how that works, add more if needed), then if none of that works get out your screw driver and try an SSD, then try changing the paste (this one IMO helps the most but is also the most involved).
Hope this helps.