I have a Compaq presario 5712 with DVD. I have lost my sound. The icon doesn't show up and the sound won't come on. In checking my hardware and software, the computer tells me my sound card is not working. This is a fairly new computer - hardly used since I bought it. I uninstalled the only two games I had on it - Jeopardy and Who wants to be a Millionaire - and that has not fixed the problem. Any suggestions before I Quick Restore? Also, will a Quick Restore help? Thanks!