"Win" + "R" opens a command window, type "control Userpasswords2" (excluding quotes), and enter.
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If there is a user Account Control window to jump out, please press "continue."
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In the User Accounts Settings window that appears, cancel the "to use this computer, the user must enter a username and password" option, and then apply. In the Pop-up Automatic Login dialog box, enter a password to determine. You can log on automatically the next time you start your computer.
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For users who have previously been set to log on by "Ctrl+alt+del", you need to go one step further and modify the Group Policy parameters of Vista system a little bit.
In the Start search box, type the "gpedit.msc" command, and enter.
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Enter the Group Policy editing window for the system; On the left, use the mouse to expand the "Computer Configuration" "Windows Settings" "Security Settings" "Local Policy" "Security options".
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In the right window for the security options item, double-click the Interactive logon: Do not need to press Ctrl+alt+del Group Policy option. Then in the Settings window, click Enabled, press OK to save the settings, and exit the editor.
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Small Easy reminder:
If you want to change back to the login to enter the password, in the third picture above to check "to use this computer, users must enter a username and password" can be.