UE4 running slow/freezes/crashes

Not sure if this is the right place to post this and I apologize if not!

Ok UE4 runs great UNTIL I switch to paint mode and try to paint on surfaces, if I attempt it will load for 7 mins sometimes just crash instead of loading. I will also have to wait some good times with dragging in things like a texture on a large terrain mesh for example. I have all my settings lowest it can go, I am pretty sure the specs on this laptop should be able to handle that.

processor: i7 4700MQ quad core
Graphics : Nvidia Geforce GT 740M 2gb DDR3
8gb DDR3 ram

Any secrets to fixing this ?