Error initializing audio

Hi! I just installed Audacity 2.0.5 and when I try to open it i get an error message which says:

Error Initializing Audio
Could not find any audio devices.
You will not be able to play or record audio.

Error: Internal PortAudio error

What’s happening? I used Audacity before and I never saw this error message on any of my computers.

I’m getting this error on a Dell Inspiron 1501 with Windows XP Pro SP3.

What are you trying to record from? A USB microphone?

Check in the Windows Sound Control Panel that the recording device that you want to use is available and enabled before you open Audacity.