Hi all, i've searching everywhere through net for solution to my problems.. found a lot but didn't works for me, also i did post on hp forums, but most answer that i got just didn't help.. Here's what i was facing right now.. recently i bought DV9644CA Hp Pavillion Notebook. my sound won't work with the latest driver i downloaded from hp (under DV9644CA category for Vista).. the QuickPlay button works fine, it shows orange when i press mute, and blue if i press it again.. but the sound doesn't come out. it will only come out, if i uninstalled the Realtek High Definition Audio Driver and let vista (Vista Home Premium) installed it for me(Microsoft High Def Audio). then i heard a sound(which is good rather than hear nothing).. but then QuickPlay button doesn't turn orange when i mute. I really hope that i can make them both work. and another thing is, my earphone jack didn't work(plug the earphone, but hear nothing, sound still come out from speakers). is this has something to do with the drivers. i really hope i can solve all this without have to send my laptop back to HP. Thanks in advanced.