Ok i've had DSP-500's since i got this computer and all has been well (they are usb headphones.) Well they ended up giving out on me so I got the audio 90 headphones. The Audio 90 headphones are regular soundcard headphones. I have onboard sound with my MSI k7t266 pro2 motherboard. Whenever I go to adjust my sound in the sounds, speech and audio devices it says there is no audio device. I also have win xp. Can anyone help me!!!!