No Audio Device Installed

I'm having a problem with my audio. Right now it states that i have no audio device installed however when I go to my device manager, it states that all the drivers and codecs are installed properly. The only way I have been able to get sound started on my computer was to go to services, click on Windows audio and start it. However, that is only a small work around and doesn't completely solve the problem since I have to do it every time I start my computer. My audio driver is a SigmaTel High Definition Audio Codec. I don't know what is going on or how I can fix it. I have Windows XP sp3.

When i click on sound/video controllers on my device manager, I get the following list (for sound):
Audio Codecs
Legacy Audio Drivers
SigmaTel High Definition Audio CODEC

Any help would be greatly appreciated.
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More about audio device installed
  1. Also I've tried updating my driver, rolling back driver, and uninstalling/reinstalling the driver. All of this does nothing to restore sound properly.
  2. I could really use some help with this problem. Any help is appreciated.
  3. I have the same problem on my laptop after reinstalling Windows XP. Did you ever figure out the issue?
  4. nope, I still have the problem and I'm completely stumped on what I should do
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