Hello, I really need a fast response! About 3 days ago I was removing some programs. When I went to itunes and pushed a song to lissen to it. And it can play but i cant hear anything. I went on youtube.com and typed, "How to put sound back." But nothing worked. My computer is eMachines. If are going to ask me about what numbers... or type i dont know nothing about that. But i really need to fix my problem. Thanks!