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Hi moyokshen115 You are probably missing the driver . For this , try to identify your sound card manufacturer and go to their site to download and install the correct driver . Identifying the sound card is not allways easy , you can ask this at the place where you bought the pc or google to the computer manufacturer's site . Wish you good luck . Best regards , fanaudi .
If the audio driver is lost or corrupted then re-install the audio driver. You can download the audio driver from the manufacturer's WEB site. Open up your computer and have a look at the audio card in the expansion slot, note the make and model of the sound card and then go to the manufacturer's download.support WEB site, select your model sound card and then download and install. If the sound card is built-in on the motherboard then note the make and model of the motherboard and go to the manufacturer's download.support WEB site, select your model motherboard and then download the audio driver and install.
This is a fairly common problem, in particular with older machines. Perhaps ones that have OEM sound cards (like Dell, HP, etc) that might be more or slightly different then the common retail versions. (The same can happen with similar OEM video cards too).
What happens is that Windows Update incorrectly thinks it found a better sound driver for you. And will probably install it automatically for you if you chose the "Express" setting at the update web screen. Instead run the "Custom" option and only install the important/urgent updates but don't check the "Hardware" update for the sound card.
To get your old sound card working again you might have to uninstall the sound driver that the update installed previously. Go to "Control Pannel", "Add or Remove Programs" and check the box "Show Updates". Find the sound driver and uninstall it.
If this still doesn't fix the problem go to the Computer manufacture's web site and down load the latest/last official sound card driver for your machine. Some times this is complicated as a particular model can have more then one sound card offering. If this is the case, download all of them. Install the driver. If you get a message about "unsupported sound card" or similar, then try one of the other drivers (assuming there were multiple choices).
Drivers for the on-board sound are probably corrupted Go to Dell's web site, type in model number and look for sound card drivers for it. Download and install them and you should be okay. If this doesn't work, check your BIOS to see that the internal sound card hasn't been disabled. One other thing to check is that the sound card hasn't been muted in your sound card settings. You can check this by double-clicking the sound card icon in your system try at the bottom right of your desktop page.
Should have an audio card indeed. But if there are audio connections on the back it will definitely have an audio card installed. Did you check the Device Manager to see if the audio drivers are installed?
In case you need to find drivers and can't find them on the Dell site, try driver finder, great program. Will also find the audio drivers on other sites if Dell does not have them.