I got this info from: https://superuser.com/questions/28647/how-do-i-enable-automatic-logon-in-windows-7-when-im-on-a-domain
Epic guide that worked for me.
Click Start, click Run, type regedit, and then click OK. In Windows Vista/7, simply type regedit in Start Search and hit Enter.
Navigate to the following registry key:
Double-click the DefaultUserName entry, type the user name to log on with, and then click OK.
If DefaultUserName registry value name is not found, create a new String Value (REG_SZ) with value name as DefaultUserName.
Double-click the DefaultPassword entry, type the password for the user account under the value data box, and then click OK.
If there is no DefaultPassword value, create a new String Value (REG_SZ) with DefaultPassword as the value name.
Note that if no DefaultPassword string is specified, Windows automatically changes the value of the AutoAdminLogon registry key from 1 (true) to 0 (false) to turn off the AutoAdminLogon feature.
In Windows Vista/7, DefaultDomainName has to be specified as well, else Windows will prompt for invalid user name with the user name displayed as .\username. To do so, double click on DefaultDomainName, and specify the domain name of the user account. If it’s local user, specify local host name.
If the DefaultDomainName does not exist, create a new String Value (REG_SZ) registry key with value name as DefaultDomainName.
Double-click the AutoAdminLogon entry, type 1 in the Value Data box, and then click OK.
If there is no AutoAdminLogon entry, create a new String Value (REG_SZ) with AutoAdminLogon as the value name.
If it exists, delete the AutoLogonCount key.
Also if it exists, delete the AutoLogonChecked key.
Quit Registry Editor.
Click Start, click Restart, and then click OK.