Confirming Proper Functioning of your Microphone
Once you have completed the above steps you can test your microphone under the Vista operating system using the sound recorder. This involves the following steps
Make sure you have an audio input device, such as a microphone, connected to your computer.
Click Start, click All Programs, click Accessories, and then click Sound Recorder.
Click Start Recording.
To stop recording audio, click Stop Recording.
(Optional) If you want to continue recording audio, click Cancel. In the Save As dialog box, click Resume Recording, continue to record sound, and then click Stop Recording.
Click the File name box, type a file name for the recorded sound, and then click Save to save the recorded sound as an audio file