Go to Start -> Run.
Copy and paste the following into the Open box:
control userpasswords2
Click OK.
Uncheck "Users must enter a user name and password to use this
computer".
In the box that pops up, replace Administrator in the "User
Name" box with your user account. Enter your password twice.
Note: You can leave the password box blank if your account does
not have a password.
Click OK twice and reboot to see if you get the desired
results.
Start | Run, type "control userpasswords2" Select the account you want to
logon to automatically. Then uncheck the box "Users must enter a user name
and password to use this computer."