blender crashes my entire pc Operating system:Windows 10
Graphics card: 980TI

Ive tested in: 2.82a 2.83

Every time i use cycles either for full renders or just the viewport after several frames it crashes, it doesnt matter if i use gpu or cpu they both crash the whole pc to a reboot my friend was able to render my file just fine and i cant seem to render anything more complicated then the start up screen in cycles
its my first day using blender and im not real sure what to do
Your CPU is too hot!  

Why ?
When you ask blender to render, the CPU (and/or GPU) is used at it's maximum (100% usage at max frequency). This produces heat.

What can you do?
Check the air flow.
Global case airflow

The air has to be able to come in and out (clean the grids and case fans for dust) and through (move cables and anything that is in the path).  

CPU Air Flow

Make sure the fan is turning and clean the dust in the fan and heat sink.

You can buy a bigger/better CPU fan/heat sink.
You can use watercooling if it's not enough. (technical and expensive but powerful)