thanks guys, that did the trick.

Or I could force video overlay in settings, but that disables Windows Aero effect.

Thanks mattisdada and ghost,

What's the difference between 6 to 10 in iMotion2? Personally I use the setting to eliminate stutters!

Is there a way to disable "realistic" feel visually?
Currently, the visual is vivid, but makes the set of some movies look fake!

I've tried to adjust brightness, with like +/-50 to see the effect, but nothing changed visually!!

* Hardware Acceleration Enabled (nVidia PureVideo)