Hello, i have recently found out that in dxdiag, i have 30 sound tabs - from tabs: 'Sound 1' to 'Sound 30'. Only tabs 'Sound 1' and 'Sound 22' have "No problems found.", while all the other sound tabs have the message: "The file tbhsd.sys is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer." Before I had only 2 Sound tabs and I'm not sure if having those tabs now is causing a problem. I have Vista Home Premium 32-bit SP2.