Relax yourself at first. To fret can’t solve any problem. Be confident that you can retrieve your Windows Vista password with educated guesses. Think about anything in relation to your password, may be your birthday, wedding Anniversary, your son’s nick name, the town where you got birth and like that. If you concentrate enough, you can easily get back your password.

Way 2: Call administrator to change password for you

It is the quickest way to ask help from other users who can access to your Windows with administrator privileges. For instance, you happen to forget a limited user account password, and you are able to ask administrator to change your password from within his or her account.
Way 3: Vista Password Reset Tool

Vista Password Reset Tool is by far the easiest and most convenient way to reset Windows Vista password even administrator password. No need to reinstall Vista system, no requirement for technology knowledge. You can retrieve your password without any hassle. Learn the steps blow to get back your Vista password:

1: You need another computer which can access as administrator. Download Vista Password Reset Software, setup and run it by following the wizard. Remember to insert a blank CD.

2: Choose "reset Windows local account password", and tick "CD/DVD" and specify your device.

3: Click "Burn" to start burning a Vista password reset CD.

4: Insert your CD to the computer you can’t access to and boot it from this CD. You will enter the interface of Vista Password Cracker under Win PE.

5: Choose the Windows installation to be processed, and select the user account you would like to reset and click "reset". When you are notified with two dictators, confirm your reset by clicking "Yes" and "OK". Your password has been removed.

6: The reset will be active after you reboot your PC.

Related Article:

Forgot  Windows Vista password?

Reset Windows Server 2003 Password?

Reset Windows Server 2008 Password?