My operating system is Windows XP. I have several problem devices. One is the Multimedia Audio Controller. I can not find the driver. I have no playback sound. The other devices are: SM Bus Controller PCI Modem Other PCI Bridge Device My motherboard information is as follows: Motherboard ID 08/30/2004-MS-7051-6A61BM4NC-00 Motherboard Name MSI K7N2GM2-LSR (MS-7051G) Please help!