What should I do if the lock screen option in the Win8.1 menu is missing?

  
                

Users of the Win8.1 system know that in the Metro interface, clicking on the user's avatar can see that there is a lock screen option. If a day suddenly opens and the option is missing (as shown below), what should I do? Xiaobian teaches you an effective method.

Procedure:

1, according to WIN + X, and then proceeds to the control panel;

2, and then click the & ldquo; & rdquo and security systems ;(Note that the view is category);
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