So, first of all, you should update your graphics card drivers. Here is a walkthru to do it. Don't download "driver talent", just use method 1 to update your drivers.
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The other issue is generally an issue with the first time running a game. The easiest solution - restart your computer. If that doesn't work, then update your graphics card drivers (shown above), restart your computer, delete the game files you currently have, re-download the game, try opening again.