Hi,
I'm kind of audio stupid so I do not know any audio linguo so I'll try to the point, and hopefully you guys can help.
Ever since I got a new computer with windows Vista, my recording has little to no sound. I don't know what the problem is

I've checked everything that I know of, and turned input to the max, and recording volume to the max. I've tried this "microphone" boost that boosts up dB, which I believe is decibals, but then it doesn't help and only makes the sound fuzzy. Recording use to be no problem with my old computer, although it had XP. This is the same for both Vista's default recorder as well as Audacity. Can anyone solve my problem?? Appreciated and much thanks for any replies or ideas.
P.S. My computer's sound thing is called Realtek, if that helps at all, I don't know if it does. Thanks!