Dell XPS420 - Sound Card - Only Speakers Recognized

I am having some issues with getting my PC to recognize a Mic. The speakers work fine, but for some reason the computer is acting like it doesn't even have a Mic jack on it. I have tried uninstalling and rebooting ... going to the Dell Manufacturing site and checking that the drivers are up-to-date ... and I am having minimal luck. Any tips pushing me forward would be great.

Product: Dell XPS420
OS: MS Windows 7 Home Premium 64 Bit.
MB: CS: Intel X38/X48
Processor: Intel Core 2 Quad CPU Q9450
Multimedia:
Video Card: ATI Radeon HD 3800 Series
Sound Card: "Sound Card - High Definition Audio Device"
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More about dell xps420 sound card speakers recognized
  1. Managed to fix it.

    I rebooted my machine, went into BIOS.
    I turned OFF the On Board Sound Card.

    I booted back into Windows.
    I went to device manager and uninstalled all sound devices.

    I rebooted my machine, went into BIOS.
    I turned ON the On Board Sound Card.
    I turned OFF Quick Boot.

    I booted back into Windows.
    Windows finally found and installed the right drivers correctly.

    Works magically.
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