Click and drag it there. If you click the wrong area, it won't move, of
course.. After you move it back, right-click the Taskbar area, click
"Lock the Taskbar" so it won't move accidentally again.
Although by default the task bar appears on the bottom of the screen,
it can be on any of the sides you prefer it on. To move it from any
side to another, simply click on an unused part of it and drag it
where you want it. Be sure to click *within* it, not on the edge;
clicking on the edge and dragging will resize it, not move it.
If it won't move, it may be locked. In that case, right click on it
and uncheck "Lock the taskbar," then try again.