Usage all the 100% of cpu

Hi, why the UE use all the 100% of my cpu, and how to fix it?

What CPU are you using? It’s pretty common to see high usage on lower end machines and if you’re compiling shaders, it’s not uncommon to sit for 100% at prolonged time - this would be pretty normal.

Also, close the Epic Games launchers; as it can, apparently, create CPU spikes for some users.