There are a number of dental appliances used today. But braces are still the primary means for straightening teeth and correcting misaligned bites in children. Braces work by applying pressure to the teeth and jaws to move them into a desired position. Braces are not the shiny mouthful of metal of years past.
In Windows 95 or any later systems, Ctrl-Alt-Delete brings up a window that allows a user to see the status of all currently running programs and to terminate any of them, and also offers the options of shutting down, restarting, and so on (the specific options vary slightly with the particular version of windows).
You will also find that the Alt key with PrntScrn will capture just the active application window or a dialog box if you have one on the screen at the time. You can also try combinations such as Ctrl key with PrntScrn to see how they behave on your PC [as some people report differences between their machines].