Restore them by double-clicking anywhere in the Clock window. In list boxes, use the up and down arrow keys to highlight items. Pressing the Spacebar switches options on and off. Pressing the Enter key has the effect of selecting the default button. Pressing the Esc key cancels the dialog box.
Most applications also have their own on-line help.
Help is always the furthest right menu option on the menu bar. To request help on a subject choose one of the options from the Help menu. Windows loads the help file for the currently active application. Move around the help system either by using the menu options, or by clicking on underlined topics in the workspace, or by clicking the buttons shown below the menu bar. A good way to find a particular help topic is to use the Search button in Help.