Get AIDA Extreme:
https://www.aida64.com/
Monitor heat of CPU, speed fan etc ...
My asus I5 ( 4 years old )was shutting down and noisy . Cleaned the fan ( not only blowing air, but removing and inspecting ) .
Laptop is now on a support with 2 fan, as the ASUS design is flawed : with lid closed ( as I use it ) , the vents to exhaust the air are blocked !!!
Since , no noise and no shutdown .
PS: increased mem from 6 gig ( 2 fixed + 4 removable ) to 10 gig ( 2 fixed, 8 removable ) : amazing increase in speed of opening apps and tabs. Disk is already upgraded to SSD