It have updating the dxdiag.exe from 6.01.7600.16385 to 6.01.7600.16418, as well one or two dll...
But after reboot when i dxdiag it's still showing 10.1 under the (Display) DDI.
Maybe i should re-run the DirectX End Users Runtimes, February 2010 update again?
Humm, it has just done like a placebo this one....I twisted & caught myself laughing, hotfixed!!