this will teach you how to hack windows XP passwords, without using any software, or using more than 2 mins of your time!
Step 1: Boot the computer into safe mode
when your starting up the computer, press F11, delete, or whatever the computers bios says to do to enter setup.
Step 2: Disable password!
once the computer is booted up in safe mode, go to -start -controlpannel -user accounts then select the administrator account, (it will say which one it is) and you should see a button to disable password, or create new password.
when thats done, shut the computer down, and use the same method to set the computer back to normal mode, and when you boot it up you will have either a new password you chose, or no password at all!!