i got a windows update for HP Quick Launch Buttons for my 8510w. it doesn't work.
anyway, whey i upgraded from vista, Quick Launch is one of the apps that Windows 7 reported as not being compatible and i uninstalled it prior to upgrade. i lived without it and saw the update from MS. i downloaded and installed it. after the reboot, no changes. buttons still don't work and the mute button is on most of the time even though i get sound. strangely, the mute button goes off just before the sound is played, then it goes on again after the sound (notification, video, etc.) completes.