Reinstall your sound card's software.
A sound card is a hardware device that is responsible for the computer’s audio output. It can be integrated, or built onto the motherboard, or may come as an expansion card. Regardless, this device needs a driver that will communicate with the computer’s operating system in order for it to function. If you happen to have installed the wrong sound card software or the existing driver is already corrupted, you can easily uninstall it and reinstall the driver.
Instructions
1. Uninstall the existing software driver. If you are using Windows XP, click on "Start," "Control Panel" and then "System." In the dialog box that appears, select "Hardware" and then "Device Manager." If you are using Windows Vista, click "Start," "Control Panel," "System and Maintenance" and then "System." On the left side of the column under "Tasks," click on "Device Manager."
2. Scroll through the list of devices and locate "Sound, Video and Game Controllers." Click on the plus sign beside it to see the list of devices. Right-click on the name of your audio device and select "Uninstall." Confirm your action and complete the uninstallation process.
3. Click on "Start," and then "Run" if you do not know the name of your sound card. Type "dxdiag" in the box" to open the "DirectX Diagnostic Tool." Click on the "Sound" tab and write down the name of your sound card listed under "Device."
4. Insert the software disc of your sound card to your optical drive or CD/DVD-ROM and run the installer. Follow the instructions on your screen to complete the installation process. Reboot the computer.
5. Navigate back to the "Device Manager" window and check the sound card. If there is a red "X" beside the device, it indicates that there is a problem with the installed driver. The current driver may not be compatible with the device or it is simply faulty or corrupted.
6. Right-click on the name of the device and click "Properties." Select the "Driver" tab and click on "Roll back driver." This will uninstall the recently installed driver.
7. Make sure that you are connected to the Internet and then open a web browser. Navigate to the manufacturer’s website and search for the driver that you need. Download and save it to your computer. If the driver is not available, search for it in other driver download sites.
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