Enable your microphone volume
1. Right click on your volume icon and select Open Volume Control.
2. Then click on OPTION.
3. Select PROPERTIES.
4. On the list, make sure the MICROPHONE box is Check, if not, click to check it.
5. Then press OK. After that you will back to the VOLUME CONTROL again. Here you will see the microphone panel appear.
So if the MUTE BOX under Microphone Panel check, uncheck it, and it will look like this:
6. Increase The mic volume as you like and you're done.