Might be a component of an anti-virus package. Found some references on the 'net making that assertion.
The point of view in hidden window mystery is the first person, Nancy who searches for the stain glass window that disappeared.
A minimised window
From the Properties window, you can change the read-only, hidden, archive, and indexing atributes of the file.
The pane that is hidden by default at the bottom of the window is typically the status bar. It displays information about the current state of the application, such as notifications, status messages, or relevant metrics, and can often be shown or hidden through the application's view or settings menu.
The Johari window is used as a tool to improve and illustrate self awareness. The hidden area of the model has messages that are things you know about yourself but others do not know.
Hidden self.
The hidden self in the Johari Window model represents information about yourself that others are unaware of. This can include deep personal thoughts, feelings, or experiences that you choose not to share with others.
The woods is a good one as the represents Luke's loss of freedom
Tiny and messy room where the window is hidden by the mountain of mess.
Courage, Freedom, Glasses, Chivalry, Strength
recover window instalation
The Window symbolises freedom, from the window she can look out to the outside world, where as, before, she was trapped by Denny. It is also an inspiration as she see's the other students on the lawn and aspires to be like them.