Unreal Engine Shader Compiler not working or taking too long.

I recently started to learn UE4. So first I imported a character from mixiamo and then it started compiling. It is either too slow but I checked through the task manager that there are no Shader Compilers or Compile Workers, I dunno the name of them, are not there.
I think that UE4 is just showing it in the editor and not really doing the compiliation.
I am using the latest version of UE4.