|Do you mean the "taskbar" which contains the quick-start icons on the left and the system tray on the right? |
To move it to left, right, bottom or top of screen, first left-click it (where there are no icons) and make sure "Lock the taskbar" is unticked - (left-click to untick if necessary).
Now place mouse icon anywhere on taskbar (where there are no icons), left-click-and-drag the entire bar to where you want it.
Lock the taskbar again when finished to avoid accidentally moving it or increasing it's width.