Could you, if it's not too hard, rephrase that post in a way that is easier to understand.
Try searching "Sound" in your Start Menu search bar... Click it and make sure your settings look like this:
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It's important that the USB mic [or in this case, the mic you want to use] is set as the default recorder (with the check-mark), and that the levels are turned up... For some reason in Vista, the levels come preset at "7" when you first plug it in.. Make sure that's at "100" so people can hear you.
It should work just fine after that.