If one session is created on Windows 7, routinely enter their password to start the session is an additional security step.
It is possible however to start the session automatically, bypassing the step of the password, if the user is alone in using the PC. The session is secure by the presence of the password.
• Click Run, type "netplwiz" in Search Box.
• Press Enter. The User Accounts window opens
• uncheck the box Users must enter a username and password to use this computer, and click Apply.
• Open the window a session automatically fill and confirm the password, then click OK.
Now, the session will start automatically without the password is requested.