I have Windows XP Home on my computer. I am wondering if there is a way for me to speak into my microphone at the login prompt to log me in, by recognizing a certain phrase I say and my voice. As there already are computers with finger print scanners, why not voice?

I am thinking of saying something like "I am the system administrator, my voice is my passport, verify me."

Voice is too unreliable as a login method.
I don't think there is.

But imagine a computer thats on sleep mode and as soon as you say that phrase, it starts and all the sweet UV lights inside your transparent case light up to show off your bitch a*s computer.

Or if you are on the mac side, sweet spotlights softly lightly to reveal the godly iMac, which swivels around on its swivel base and at the same time two other 23inch Apple Displays switch on to show the prowess of your mac.

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Hmm If only I had the cash and was bored enough to do this.

And what if you say something like:
uppercase-A-comma-C-eight-semicolon-two-P-F-ampersand ? It would be a lot more secure.