Infinite time building

Hello there, guys. My Unreal 4 has been like that for a while. I do not know whats goin on!
The particles do not show correct, even the texture. Everything keeps showing the null texture on the view.
And when I put the software to make the building, I always stuck on the 20%, in any project.
Anywhone was any sugestion?
My hardware is a Threadreapper 1950x a Vage Frontier Edition and 32gb of ram