Unreal engine is getting freezed when i use landscape sculpt tool

Hello,
I have installed UE4 and started learning to develop game in it. But when i tried to develop a landscape and try to use sculpt tool, Editor gets hanged. It happens with creating Materials too. When i right click on content browser it got hanged again.

My laptop has Intent CoreI5 processer with 8 GB RAM, Intel HD Graphics 5500 and NVIDIA GeoForce 820M.

Is this due to low Graphic card or low Ram? I have search other questions here but no one has same problem.

Here is my
DxDialog file. Can anyone help me please.

Edit:

It seems that trying to add new blueprint also freezes UE4.