Check to see if:
Plug and Play Software Device Enumerator is listed under System Devices in Device Manager. If it's missing and have no sound follow the directions on the following website to fix it.. worked for me.
http://www.annoyances.org/exec/forum/winxp/t1066427444
I take no credit for coming up with this solution... but I certainly will try and point people in the right direction.
Happy computing!
Tinkerz