I have a Compaq and used to have no problems with audio until recently. The problem started when I was looking (just guessing) for a driver for my cell phone using one of these driver repair programs offered on the internet. After scanning and downloading the drivers the program said I needed. The sound ceased to work. The message I'M getting is "no sound chip installed or is in use with another program. Any suggestions? I've done everything I could think of but still no sound. Please advise...Thanks again