We click the windows button on the keyboard or on the screen with the help of the mouse. We all know that Ctrl and a combination of any letter perfoms a special function. If we press Ctrl + c it copies the selected text or image displayed on the computer or laptop. We press Ctrl + v to paste the selected copied text from the clipboard.We can press Ctrl with the combination of the esc key to open the start menu. However it consumes more time than pressing the windiws key on the keyboard or with the help of the mouse. If we want to impress our friends we can press Ctrl with the combination of the esc key.