How do I set up a windows account, so that Windows will accept any password to login. I want to create the illusion of security for the user. Where the user believes that there account is secure and has a password, when it actually has none. I am obviously operating under the assumption that I am an Administrator on the computer in question. How would I go about doing this?
For Vista and newer you would need to write your own Credential Provider to be shown at the login screen along side the normal login.
For XP and older you need to write a new GINA interface, this in theory could replace the old login entirely (and that is one of the reasons why Vista and newer no longer uses GINA).
Any advice on how to do either of those is off topic for Super User, you would need to work on it on your own and when you get stuck go ask on Stack Overflow about the specific issue you are having creating your own implementation.