I tried to use a usb sound card that is plug and play. no drivers needed nor does it come with a cd. it does not work in any usb port even though it is being powered. all 10 ports are enabled and the realtek driver is working. the REALtek hd audio manager screen is missing. I tried to download it but failed. the "run" dialog after extracting does not appear. the overall volume is now lower. all volume sliders are at 100%. before the sound card I had the sliders set to 60 to 80%, more than enough. any higher produced clipping. i suspect the manager had something to do with allowing a lower slider setting. how do I download the manager as a separate app? for HP elite 8000 cmt, win 7 pro 32 bit. At present tv volume needs to be increased to compensate. I am using a pc to tv converter. the audio comes from the line out jack. the small amp connected to the same line out is not effected. solutions please?