Ok,
I bought a headset that comes with a microphone in it. However, when I go into the confiquration the voice setup is whited out.

http://img517.imageshack.us/img517/8352/confiqbd5.png

The headset works fine, i have recorded my voice cleary, i am using it for voice recognition.

I have Vista Home Preminum
Nvidia 8500 Graphic's card 512mb

If you need anything else, ask.