I am going to refer you to this post.
https://forum.game-guru.com/thread/212251
Is there a chance you can get a hold of a more powerful computer?
You could try setting all the settings on lowest and see, but I am still guessing it is your graphics card or on the mother board graphics that are stopping you.
If you can not get another machine, then you may want to apply for a refund, so dont over use it till you make a decision.
My system specs below are about the lowest you really want to go with.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.