This model is going to be slow. At least it's not as bad as an AMD E1 machine that we tried with more RAM and faster HDD (didn't help at all.)
I'd return this one and go shopping. Don't settle for less than say an AMD A8 laptop.
Example at 320USD is http://www.bestbuy.com/site/lenovo-15-6-laptop-amd-a8-series-6gb-memory-500gb-hard-drive-black/2996026.p?id=1219567191659