i need his driver where can I find it

Support Information:
Device Type: Sound Card
Manufacturer: cmedia
Model: cm18738
Interface: Other
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=&qa5=19&qa7=1500&dp=3&qm0=cm18738&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=cmedia+Sound+Card+cmedia+cm18738+Windows+XP+Prof essional+)

Try here

http://members.driverguide.com/driver/detail.php?driverid=8420

It's CMI8738. Drivers can be found on the C-Media website (www.cmedia.com.tw/)