Here are two methods for auto login on Windows 7. The first if for computers that are not members of a domain and the second is for those that are members of a domain.
Non-domain computer:
1.Press the Windows key + R on your keyboard to launch the “Run” dialog box.
2.Type in control userpasswords2
3.Press Enter. The User Accounts window will display.
4.Uncheck the option “Users must enter a user name and password to use this computer”
5.Click “OK”
6.You will then be prompted to enter the current password and confirm it.
7.After doing so, you will no longer be prompted to enter your password upon login.
Domain computer:
1. Press the Windows key + R on your keyboard to launch the “Run” dialog box.
2. Type regedit and hit enter to open the Registry Editor
3. Then browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\
4. Set AutoAdminLogon = 1 (Create it if it doesn’t exist. Make it a string variable)
5. Set DefaultUserName = your username (Create it if it doesn’t exist. Make it a string variable)
6. Set DefaultPassword = your password (Create it if it doesn’t exist. Make it a string variable)
7. Set DefaultDomainName = your domain (Create it if it doesn’t exist. Make it a string variable)