If your computer is having problems recording sound, try using the Recording Audio troubleshooter to fix the problem. It checks for common issues, such as making sure that both a working sound card and a recording device are installed on your computer.
To make sure you have the most up-to-date troubleshooters from the Windows Online Troubleshooting Service, your computer should be connected to the Internet. For more information, see Troubleshooting in Windows.
Open the Recording Audio troubleshooter by clicking the Start button , and then clicking Control Panel. In the search box, type troubleshooter, and then click Troubleshooting. Under Hardware and Sound, click Troubleshoot audio recording.
If you're prompted for an administrator password or confirmation, type the password or provide confirmation.