How do I determine if my computer has a microphone?
Desktop computers use external microphones, which means you need a microphone connected to the computer. If you do not have any microphone attached to your sound card (the same place as your speakers) you do not have a microphone on the computer.
Tip: Many webcams have microphones on them that can also be used as a microphone.
If you have a laptop or other portable computer it is likely that it has a built-in microphone. The microphone is be on the top or in the front of the portable computer and be identified with a picture of a microphone or "Mic" next to a small hole.
Where do I buy a microphone?
Almost every local computer store or electronics store will carry a microphone that is compatible with a computer. If you have determined that your computer did not come with a microphone visit a local retail store or visit an online store to purchase a microphone.