Hi Lux, if I am not mistaken your laptop has "switchable graphic controllers" as does mine, you should open Catalyst Control Center and under graphics options choose --> ATI PowerXpress, then click the "High Performance GPU" it should then pop up a screen asking if you wish to change to "High Performance GPU" click change, the screen will flicker and then come back, this rectified the problem for me when I had said issue.
You may also want to reboot after before you run GW again, and also configure the ATI PowerXpress settings as when on Battery if will most likely switch to "Power Saving GPU" again.
Hope this helps.
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