No password Win7 directly into the system

Win7 must log in the user name to enter the system, rather than directly enter. Moreover, the current account does not have a password. This problem is very headache for me. Can I go directly to the system? There are still methods.
Step 1: Enter
"netplwiz" in the Start menu search box and press Enter to open the Advanced User Control Panel.
Step 2: In the advanced user control panel, first select the currently used user name in the local user list, and then cancel the " to use the machine, the user needs to enter the user name and password (E)" Check the item.
Step 3: After the setting is completed, the system will pop up a window asking for the username and password of the default login system. Without entering any password, click OK to complete. Restart the computer again and you will find that you can automatically enter the system automatically.