Turn on Automatic logon in Windows 7

If there are multiple user accounts and you need to have a particular user account logon automatically (meaning that a particular user will login into the computer without having to type the user name and password). To turn on automatic logon, perform the following steps:
1. Click Start button . In the Search programs and files field, type netplwiz and press the Enter key from the keyboard. (If you are prompted for an administrator password or confirmation, type the password or provide confirmation).
2. From the User Accounts dialog box, under Users for this computer: click to select the user account that needs to be logged on automatically and then click to remove the checkmark beside Users must enter a user name and password to use this computer. Now, other user names will be grayed out.
3. Click Apply. Now, Automatically Log On dialog box appears. Enter and confirm the password (If no password is set for a user then leave the Password: and Confirm Password: boxes blank).
4. Click OK to close the Automatically Log On dialog box.
5. Click OK again to close the User Accounts dialog box.