UE4.9 freezing and not responding.

Downloaded the landscape mountains and a few other things from the LEARN tab. When I import everything into my own project and try to set materials or drag meshes UE just freezes and stops responding and never recovers.

Anyone have a workaround?


AMD FX 8120 Overclocked to 4.0ghz
16gb DDR3 1866
2x FXF Double D 7850 video cards