I think that's kind of low. By comparison, here's my slow(ish) laptop specs:
AMD A6 3410MX with Radeon Graphics built on the chipset, Quad Core, ~1.6GHz
8GB RAM at 1333MHz (Was 4GB when bought, upgraded)
AMD Radeon 6520G, 4GB VRAM
The game runs (semi-glitchy) for me after several restarts, but it pins my CPU at 100%, making work up a sweat.
You might need an upgrade. I might suggest upgrading to something like a Hexa-Core.