I forgot my password to my mac book and don't know how to reset it in the security privacy field

i forgot my password to my mac book and don't know how to reset it in the privacy security field, can anyone help? Thank you.

Put your install DVD into the optical drive (CD/DVD drive) and reboot. Be sure to either use the disc that came with your Mac, or, if you installed a later Mac OS X version from disc, use the newer disc. As soon as you hear the boot chime, hold down the "c" key on your keyboard (or the Option Key until the Install Disk shows up) until the apple shows up. That will force your MacBook to boot from the install DVD in the optical drive.
When it does start up, you'll see a panel asking you to choose your language. Choose your language and press the Return key on your keyboard once. It will then present you with an Installation window. Completely ignore this window and click on Utilities in the top menu and scroll down to Reset Password. After resetting the password use Startup Disk from the same menu to choose your hard drive for startup and restart.
If you're running 10.7 Lion check this article
http://osxdaily.com/2011/08/24/reset-mac-os-x-10-7-lion-password/

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    EZZTHEKILLER wrote:
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    EZZTHEKILLER wrote:
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