Check computers problem,there is an hardware problem in your computer,take help of service center.Secondly try the software which is suitable for your system.
Hi, For Windows to recognize your sound card, you must find and install a compatible driver for your sound card. Most sound cards require driver software to work properly. Be sure that you have installed any software discs that came with the device. If you don't have a disc or the software on the disc does not solve the problem, follow these steps: Check if a driver for your sound card is available through Windows Update. For more information, see Install Windows updates. If Windows Update does not find a driver for your sound card, visit the website of the sound card manufacturer to check if a driver is available. If one is available, download it. If not, contact the manufacturer. Open Device Manager by clicking the Start button In Device Manager, look for a sound card under Sound, video and game controllers and confirm that Windows does not recognize your card. Close Device Manager. Open Control Panel by clicking the Start button In the Search box in Control Panel, type add hardware. Click Install drivers for older devices with Add Hardware wizamy computer does not accept - 18abb370-ac1e-4b6b-b663-e028a75bf05b.pnges/18abb370-ac1e-4b6b-b663-e028a75bf05b.png" alt="18abb370-ac1e-4b6b-b663-e028a75bf05b.png" class="h_mi" /> If you are prompted for an administrator password or confirmation, type the password or provide confirmation THANKS...... WITH REGARDS........ VAISHU
, clicking Control Panel, clicking System and Maintenance, and then clicking Device Manager.? 
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
, and then clicking Control Panel.
For
Windows XP this is the procedure to turn it ON.
Go
to 'Start'--->Settings---->Control Panel----->Sounds and Audio Devices
Here
you will get a window where you will find all the sound related options. Here
you will be able to modify the volume levels and check whether the mute
checkbox is ticked, if yes then uncheck the box and click on OK.
Your
problem should be resolved.If not resolved please revert back and I will give you the steps to resolve the issue.
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