okay, itzdaniel, after doing clean install of the windows, most of the problems are solved, only the back usb 3.0 seems to be not functioning properly. i've checked the installed programs in control panel, Ranesas USB driver seems to be already installed...so i thought maybe i should update the bios like THE UNKNOWN suggested. Seems i haven't done any bios update before, i should dig in some little more.
but before that, do you guys have any other suggestion regarding the USB3.0 problems? 'AS I RECALL' :P, my intel MB DP67BG's usb3.0 are functioning even before i installed the usb driver.
the problems is that when i connected the mouse, the optical led light up, but the mouse isnt functioning. The port also couldnt read my external hdd..