Hi CesarRoque,
What is the make & model of your computer?
You may provide us the hardware ID of the device from device manager:
a. Click Start, Run button, type “devmgmt.msc” in the open box and press "Enter".
b. Expand sound card & right click on it, click on Properties.
c. Click on the "Details" tab at the top and select "Device Instance ID" from the drop-down menu at the top.
You may download & install the latest sound card drivers from the computer manufacturer’s website.
For more information, refer to this link: How to manage devices in Windows XP
Refer:No sound in Windows
Hope the information helps.
Please post back and let us know.