Why My Laptop Fails To Recognize Built-in Microphone

Q: Why Does My Laptop Fail To Recognize the Built-in Microphone?

A: My laptop is an ASUS model with i5 CPU core. It's got a built in microphone as the spec says. However when I use Skype for some reason it does not recognize the built-in microphone. If I use an external microphone then it works.

After some tweaking and searching I finally found that the microphone setting in Control Panel -> Sound -> Microphone is "not enabled". After I set it to "enabled" it works!

If not let me know!