On a Windows 7 with only a single user or a single user but with several main major user accounts, it may be more convenient and faster boot time if the Windows 7 has automatically logs on or logs in privileged user account.
By default, if only one user account is created or defined with no password after installation of Windows 7 operating system will automatically sign in on the desktop of the user account after startup. However, the creation of additional user account, or transfer of its powers and password, the Welcome screen appears instead, requiring users to manually select the user account to connect. Sometimes, some applications such as VMWare can also create a new user, which causes Windows 7 to ask the user to manually connect, despite the system is self-connection for all time.
How to configure Windows 7 to automatically Log in to windows, without clicking and without entering a password:
Click the Start button, then enter the following command in the Search box:
Then press the Enter key to open Advanced User Accounts control panel applet.
Tip: You can press Win + R to open the Run dialog box, then enter the command control userpasswords
Make sure the Users tab is selected.
Uncheck the box and uncheck the box Users must enter a user name and password to use this computer.
Click OK or Apply button.
In the “Connect automatically” dialog box, enter the username and password that wishes to be used to automatically connect to Windows 7.
Tip: If the user account has no password , simply leave the password field empty.
Click the OK button.
Windows 7 will automatically log on the system from now on