How to Eliminate the Windows logon prompt
eliminate Windows from prompting for a user name and password as long as you aren't using
user profiles or logging on to a domain or NT server.
Go to the control panel and launch the Network applet. On the Configuration tab,
select the Windows Logon from the Primary Network Logon drop-down Menu. Now click on
the OK button. When asked to restart, click no.
Now, in the Control panel launch the Passwords applet. On the Change Passwords
tab, press the Change Windows Password button. Type in your current password and in
the Old Password box. Leave both the New Password and Confirm New Password boxed
blank. Click OK. Select the User Profile tab and make sure the "All users
of this PC use the same preferences and desktop settings" is selected. Click OK
and restart Windows.
Now Windows will not prompt you for a password.