Have you ever done something you wished you could undo? Unlike real life, Windows allows you to undo an action you did not intend.
If you deleted a block of highlighted text when you meant to copy it, don't despair. Simply press the Control Key and Z simultaneously. Suddenly, the text you accidentally deleted is restored.
You can undo lots of actions in Windows with this simple command. Control + Z can be your savior. Use it next time you make a mistake.