Locking feature of Windows that works in the background

  StepByStep 12:26 05 Dec 2014

Hi All! Lock the screen of Windows, is working with the screens by locking the background, just have a feature that will allow the program to be open? I would be glad if you help friends who are knowledgeable about this topic. (For example, electronic test, enter user name and password, and full-screen pop-up program, the output until you have taken other operating screens will remain locked. Thanks in advance! And please help me?

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