so I upgraded to windows 7, but I haven't been able to get my audio to work.
I installed all the drivers and my computer recognizes that I have the most updated drivers. Everything is plugged in correctly and even when I do sound tests it works. But for everything else, like itunes or youtube, nothing comes from my speakers.
my onboard sound is Realtek ALC888 and my motherboard is GIGABYTE GA-EP43-DS3L
I had issues some days ago with my sound, also using Windows 7, I replaced an upgraded driver version for ALC889A back to the drivers supplied with my motherboard and everything seems to be fixed.
Maybe that could work for you too if you have the original driver disc.
I had a problem with the realtek sound on my gigabyte board not to long ago. Found out that for some reason windows set it play for the front audio ports by deafault. Pretty easy to fix and might be something you want to check on.