I have an HP Pavilion Entertainment PC. The harddrive became corrupted and it wouldn't start anymore. I had a guy try to fix it but he said he was unable to so it sat around for about two years. One day a few months ago I was checking it and it started up but it would die again until I bought a Neo-Smart recovery disk and now it starts fine. However, I have two problems. I used to have sound and the DVD drive used to work. Now I have no sound and get a message that no audio device is installed. what happened to it and how do I get sound back? Also, now the computer doesn't recognize when I put in a CD or DVD. How do I fix that? Thanks.