OK, OK, where to begin... I have a 'selective' sound problem on my computer. I am not computer-savy; my dad 'is,' but he's from Vietnam and computer-lingo isn't exactly his forte. Recently, he's upgraded my computer. From what I can gather, my computer now has: Intel(R) Pentium(R) D CPU 2.80GHz 2.79 GHz, 1.50 GB of RAM The pertinent addition (and maybe problem child is: Realtek AC97 Audio device State of sound on my computer: Videos from Youtube work, BUT don't play sound. Certain PC games work, BUT don't play sound. Web games work, BUT don't play sound. Anything that uses Adobe Flash Player 9 doesn't play sound. Windows XP OS sounds, ex: startup sound, prompts, etc. Exceptions: iTunes, sound still works. Starcraft, (why it's sound still works, is beyond me) streaming Window's Media Player content from the web, such as CNN or filecabi. So... PLEASE! PLEASE! PLEASE! HELP!!! I don't want to use Window's Troubleshooting again! Help me solve this @#$%-ing mystery!!!