There is different ready made tools are present to recover lost passwords.
I want to Know some of the things from you?
Q.1. Have you forgotton Administrator Password?
Ans : Yes,It is possible to recover Administrative Password.
Q.2. Have you forgotton General User Password?
Ans : Press Ctrl+Alt+Del at Login Screen,Put the User Name as "Administrator",In Password Box,Don't type anything,Click ok.It may work or may not depending whether you had provided Administrator Password during Loading of OS.If you had not provided Password At Loading Time,then Windows will open,after that You can change your password by using Control Panel option.
In case if you need my help,I will definitely suggest you for better tool for recovering Administrator Password.
Thanks & Regards
Ahmed Ali Khan