Did you just forget the password? If it isn't too complex, Ophcrack can crack it for you. You need to download the .iso file and burn it to a CD (using some type of extraction/burning software like Infrarecorder. (Do not just burn the the .iso file straight to the CD or it will not work). Put your newly burnt CD in the CD drive and restart the computer. Make sure your BIOS is set to boot from CD (most are already). After it finishes booting, it'll automatically start cracking your password. All this is free, legal, and open source.
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I once heard the voice of God.
It said "Vrrrrmmmmm." Unless it was just a lawn mower.