Freeze when grabbing texture (winx64)

Hi

I have problem. I have 64bit windows, 4GB RAM and dual core 3.7Ghz. When grabbing texture from content browser UE freezes and i have to wait about 20 seconds.
After 20 seco ds i can grab this texture normaly without any freeze. When i grab another texture, process reapeats.

Hey 01zabil01,

The reason you may have some freezing or lagging on your system when you’re using the editor is because you’re below our recommended computer specifications. You can review the requirements below, or by clicking here.

What are Unreal Engine 4’s system requirements?
For developing with UE4, we recommend a desktop PC with Windows 7 64-bit or a Mac with Mac OS X 10.9.2 or later, 8 GB RAM and a quad-core Intel or AMD processor, and a DX11 compatible video card. UE4 will run on desktops and laptops below these recommendations, but performance may be limited.

Cheers!