Automatic Login Without Entering Password Every Time "control userpasswords2"

In windows 7 / 8 :  You need to open the Run command : Press the windows button and R at the same time or press Start then Accessories then type Run, type "control userpasswords2" 

Now  Type netplwiz

Click and highlight the user you want to login every time with.

Untick : Users Must Enter A User Name and Password To Use This Computer.

Click apply

You will need to re enter username and password again.

Reboot, it will login automatically with that user.