Just click on any part of the bar where there are no icons and drag it back down to the bottom, should snap into place. If it doesn't move, right click on the task bar, untick Lock Task Bar, try dragging it down again.
Just click on any part of the bar where there are no icons and drag it back down to the bottom, should snap into place. If it doesn't move, right click on the task bar, untick Lock Task Bar, try dragging it down again.