Now here is a quick tip to reset the Windows Administrator Password without knowing the password at all. To do so, Right Click My computer and go to manage. Click Local Users and Groups and select the Account with the password you wish to reset. Right Click said account and Go to Reset Password. Type in your new password twice and you are done!

What if you cannot login to your computer at all? Then I would suggest you look into Ophcrack. It is a bootable Linux CD that will crack your password in a matter of minutes. All you must do is burn the .iso to a cd and boot to it.

Download Ophcrack