I have an HP dm3t notebook which normally comes with Windows 7. I figured out how to install Windows XP on it, but now I'm facing a problem that the brightess controls don't work so am unable to change the brightess.
The strange thing is that all the other buttons (sound volume, mute, sleep, etc... ) works but not the 2 brightess controls.
I already downloaded the HP Quick Launch Buttons, but it didn't fix the problem. So I am asking about suggesitions how can I enable these two buttons in Windows XP or even if I can change the brightess using some kind of software.