How to prohibit others from logging into their computer in win7 system

Today, when personal privacy is very important, we don't want our computers to be used by others, especially if we don't know it. So let's learn how to prohibit others from logging into their computers in the win7 system.
Step 1: First, open the start menu of win7 Ultimate, then click to enter the control panel, and then enter the account settings interface in the control panel.

Step two: Unlike in the past, now we have to do is to set up a user account inside the window, change the way users log on and log off, and then pop up the settings interface, find the "Use the Welcome Screen "and "use fast user switch" these two options, and then remove the check box in front of the two options, then we can only use their own set user account password to log in win7 system .