Through Advanced User Account Window
This method applies to all computers that are not part of a domain network, such as Home Computers running Windows 7.
For Computers Connected to a Domain
If you are on a domain network, then the method above will not apply to you. This is because usernames and passwords are assigned by the Active Directory therefore to login without entering a password in a domain environment you will need to modify the registry. To do this, follow the steps below: Warning: Proceed at your own risk as editing the registry needs technical expertise and if not done right, you may damage your system beyond repair. Press and hold the Shift key after you log off or when Windows starts if you want to bypass the AutoAdminLogon process and want to log on as another user,
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