3. Your taskbar has disappeared
The taskbar is that horizontal bar at the bottom or your computer screen that displays open programs on your desktop. The taskbar also contains the Start menu, which allows you to navigate to various programs installed on your computer. In many ways, it's your command central.
Thus, there's nothing more frustrating than going to start a program, only to find the taskbar gone. A computer without a taskbar will bring you to a grinding halt.
The good news is that the taskbar never disappears—it just hides. It may be hiding behind other open windows, or at the top or side of your screen. You can also (unintentionally) make the taskbar so thin that it seems invisible.
The following are possible reasons why your taskbar has vanished, as well as solutions to keep your taskbar from ever running away again.
Solution 1: Find your taskbar behind other windows
If you don't see your taskbar, minimize all windows on your desktop. See if your taskbar is hiding behind your open windows.
Examples of maximized window with taskbar hidden and minimized window with taskbar visible.
Finding your taskbar behind maximized windows
Set your taskbar so it's always on top of all desktop windows:
Right-click the taskbar, and click Properties.
Select the Lock the taskbar check box.
Make sure the Auto-hide the taskbar check box is not selected.
Taskbar page on the Taskbar and Start Menu Properties dialog box. Under appearance, the Lock the taskbar checkbox is selected.
Locking and keeping the taskbar on top