I think there was a driver update (14.25.50 or later) for your chipset, which enabled independent display rotation.
Otherwise there may be a entry in the windows registry which is called something like "Display1_EnableIndependentRotation" and has the value set to 0 (00000000x0). Try setting it to 1 (00000000x1). And try to set the value for Display1_IndependentRotation to 1 as well. Save and restart the computer.
Then right click the Intel Graphics Media Accelerator in the shortcut bar. Go to Graphic options -> Rotation -> External Display - > Rotate by 180°.
I hope this helps.