Report "Realtek 97ac My speaker will not play sound no more. It says that I don't have my sound device. This is the message... Windows Media Player cannot play the file because there is a problem with your sound device. There may not be a sound device installed on your computer, it may be in use by another program, or it may not be functioning properly. When I check the devices, only one of them (multimedia audio controller) says it's not working properly. It says the manufacturer is unknown, location PCI bus 0, device 31, function 5, and date unknown. When I try to reinstall driver, it says insert a disc, (I don't have the disc). I don't know what realtek is, can you help me?"