Sound Not Working

[LAXn'DRUMS]

Hello, I have a HP Pavillion that uses Windows XP. Recently my computer has
appeared to be playing a sound but I cannot hear anything. My volume control
icon has disappeared from the taskbar. I cannot adjust the volume and when I
try to adjust the volume I get an error message saying: "There are no active
mixer devices available. To install mixer devices, go to Control Panel, click
Printers and Other Hardware, and then click Add Hardware." A day or two ago
I tried to troubleshoot my problem. After trying to troubleshoot my problem
for a while I got to a point where I noticed there was a yellow exclamation
sign next to a device in the device manager called "Plug and Play
Enumerator". I then troubleshooted this problem and I was told to try and
reinstall this device by first uninstalling it and then going to Add Hardware
to reinstall it. I failed at this too because after uninstalling it I could
not figure out how to reinstall it. So now the device "Plug and Play
Enumerator" is missing. I do not know if that too has something to do with
my sound problem. Lastly, when I open Sounds and Audio Devices from the
Control Panel it says that I have No Audio Device. My sound has been working
fine for the past years until recently. I do not know if this will help
anyone to figure out my problem but I also have a Realtek HD Audio Manager.
I would really like to have the sound back on my computer. Please respond
and help me. I need major help on this problem. Thank all of you very much
in in advance.

 

[sgopus]

if your sound card is a part of your motherboard, ie built it, not an add on
card, then using the motherboard drivers cd, just reinstall the audio drivers.
if it's a seperate add on card, then using the sound card cd provided by the
sound car manufactor, reinstall your sound card drivers, or download them
from the website and install.