Press the Win + R keys on the keyboard. The Run dialog will appear on the screen. Enter the following command in the Run box and press OK:
Select the user account from the list for which you want to setup automatic sign-in.
Uncheck “Users must enter a user name and password to use this computer” and click on the Apply button.
If the Apply button is greyed out/disabled, then just Check and Uncheck “Users must enter a user name and password to use this computer” to Enable
The Automatically sign in prompt will appear. Type your password twice and you are done!
The selected user account will be automatically signed-in when the computer starts.
Whenever you change your user password, repeat the above steps to keep auto sign-in.
Why we need auto sign-in?
If you have scheduled auto run of any UI applications in your computer, then the auto run will fail if the user is not signed-in.