Yup, i am disabling it in the BIOS....
Try dropping your overclock back to stock speed 2.93Ghz & then enable HyperThreading to see if the problem is still there.
I been overclocking for may years & some CPU's might check stable with HyperThreading enabled with stress test software.
But run into trouble when running such things as a game. So test without the overclock. Then if there is still a problem post back.
Edit: even if it works post back it might help others. Some times you have to up the north bridge voltage or others to get HyperThreading
stable when OCing..