UE4(4.14.0 ~ 4.14.3), not responding after opening blueprint

I have a big problem when I’m using UE4 editor after opening blueprint.
It takes so long time (over 1 minute or more minutes).

There was not problem when I’m using UE4 4.13.
This trouble appears from 4.14.
I cannot fix this problem after reinstall Windows many times.

This trouble always appears even if I create a basic unreal first person blueprint project and others.

Please help me.
I cannot work in this state.

My Development environment is…

  • ASUS Notebook (GL502VS-FI035T GTX1070)
  • Windows 10 Home 64bit
  • 32MBytes Memory.
  • 1920 * 1080 display(monitor) resolution

Thanks in advance.