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Howard writes in with a troubleshooting question:
Question: I'm Having trouble with my sound device and there is no sound now. How may I fix it and what s wrong? Is it a Virus?
Answer: There are a couple of things we can look at here. The obvious things are to check the speakers and volume. If you know the speakers are plugged in and are working then we can bypass this step otherwise you may want to check them on another computer or try different speakers on your computer.
Next let's double click the speaker icon on the taskbar down by the clock. Make sure none of the mute checkboxes are checked.
Another thing to look at is to go to Control Panel and double click the Sounds and Audio Devices icon. On the Volume tab make sure the Mute box is not checked and click on Speaker Volume and make sure they are not turned down. On the Audio tab make sure you have your sound card listed in the Sound playback section under Default device.
On the Hardware tab make sure that your sound card is listed there. You can also check Device Manager to make sure there are no conflicts. Check out this page for more information on troubleshooting using Device Manager.
You can also reinstall drivers from here if you have your software from your sound card. You may also want to try to rollback the driver to a previous version in case it got corrupted on an update.
The worst case scenario is that your sound card went bad. If its a PCI card type sound device you can take it out and replace it with a new one. They are pretty cheap nowadays ($25 and up). If your sound is built into your motherboard then you can disable the onboard sound in the BIOS and add a PCI sound card.