System: HP dv5 Laptop Intel Core 2 Duo T5800 4gb RAM Windows Vista SP2 Here's the deal. Itunes and Windows Media Player can play music both through the computer speakers and through headphones. When I load up youtube or any other websites with sound, I get nothing through the computer speakers. However, the sound will play through the headphones. I have checked all of my internet options to make sure "play sound in browser" was checked, etc. I have confirmed that all of my audio codecs and drivers are up to date. I checked control panel > hardware and sound > sound, and made sure all of my volume settings were at full, and nothing was muted. Something interesting that I noticed was that when I go to system sounds, I cannot hear/test any of my system sounds. Also, windows does not play the start-up/shut-down noises. Any help would or suggestions would be greatly appreciated. Thanks guys.