system
A chat on subreddit /r/pcmasterrace
human
Yeah you need to stop using the PC until you get the temps under control. 100C is not a safe operating temperature.

The stock i7-7700 cooler should keep it under this temp though. Was it installed correctly?

Either way I would just put a new cooler on it.
gpt
It's not a stock cooler of 7700 but G4600's. I decreased power usage of CPU. And now it's between 60c and 70c. I have to buy a decent cooler.