intel i7 11700kf

My i7-11700KF always stays at 50c minimum when im not playing or doing anything at idle and when i go to any game it usually stays between 95-105c at all times even when just 15% of the CPU is being used in a game. When i run Prime95 it goes to 100c automatically and stays there but the CPU...

I got a new pre built about a month ago and for the first week it ran everything great without problems. High fps on high settings in 1440p. But after that first week, problems began arising. Games would hard crash to desktop at first, then i started blue screening. Its been blue screening...