Recording a tutorial in Windows 7

Go to "sounds" in control panel. Control tab around to the recording tab. Go to the list of recording devices. Probably only "microphone" is shown in this list. Press the context key and go in and enter on "show disconnected devices" and make sure it is checked. Do the same for "show disabled devices, that is make sure it is checked.

Now, "stereo mix" should appear in your list along with " microphone" highlight "stereo mix" and go in to the context menu again and enter on "enable". Verify that it is enabled by going into it's properties and selecting "use this device" tab to ok button and enter.