The two reviews, as of this date, say that the card does not work on their computer or that they have major problems with it. I have a motherboard with onboard sound, and I will bet they do also. I also have Windows XP. Disable or remove the onboard sound, reboot the computer, then install the drivers for the sound card. It will work just fine. You can find this information on the I/O Magic webpage under their forums. Good sources for information if you are having problems. I did have a problem with WinRip, an included software program. Freezes every time. I dumped it. Rest of the free software works o.k. If all the software worked, I would have rated this card a 5.