Your specs are pretty close to the minimum, if not below, unfortunately. You ideally want a dual-core CPU...yours is single-core hyper-threaded which isn't quite the same. Also, your RAM is at the minimum too. The GPU should be able to play it on lower settings, but is in all likelihood being hampered by the CPU and RAM.
That's not to say you can't play it on minimum settings. But if I'm being honest, I'm not surprised you're struggling to play it at decent frame-rates at higher settings.