My computer spec can run UE4 well?

]1my editor keep crash

Definetly not well. My laptop has an i7 3610qm (~twice as fast as yours) and 8gb ram and can barely handle the editor. I am only using my laptop for scripting and UI because the 3d viewport is so expensive on performance. The engine alone can easily require more than 4gb ram. Official recommended specs are 8gb ram and a quad core cpu.