Max. Operating Temperature (Tjmax): 95°C
Your processor comes bundled with a AMD Wraith Stealth CPU Cooler which is the weakest AMD CPU Cooler they have. It is good for normal and moderate to some heavy loads but the processor will run hot almost to its Maximum Operating Temperature of 95c.
Since your processor is overheating to the point of reaching the critical temperature to shut down your PC means the CPU Cooler is not doing its job or you have some other external factor that is not allowing the Stealth to keep your processor from overheating.
1- The CPU Cooler Wraith is not installed correctly or the Cooler's Fan is not working the way it should.
2- Under powered CPU Cooler
3-Poor air circulation inside your PC case. Remove the side panel of your PC case and see if Temperatures are slightly lower or it takes longer to overheat. If it does it indicate poor air circulation.
You can always, temporarily, leave the side panel off and direct a floor fan directly inside your PC case until you get a better PC case or strong AIR CPU Cooler.
4-One of the PC Case fans is not working causing poor air circulation inside the PC Case.
5-Possible poor PSU Output voltages.
In my honest opinion I would upgrade the Stealth to a CPU Cooler rated at least 150 Watts TDP or higher. There are many that cost forty dollars or less that are that powerful. Go to PCPARTPICKER and input your processor then click on compatible CPU Coolers. There you should find something that is within your budget and will fit inside your PC Case.
EDIT: Download and run OCCT Stress test to test your CPU Cooler efficiency. It is overheats during one of the 3 tests (CPU, GPU, or PSU) that would indicate a weak CPU Cooler. Check CPU and Case fan speeds, Temperatures, and PSU Outputs.
