"To add the toolbar back, you’ll want to right-click on an open area of the taskbar, and choose Toolbars \ New Toolbar from the menu. You should probably also unlock the taskbar at this point. Now’s the slightly tricky part… you’ll want to paste the following path into the location bar:
%appdata%\Microsoft\Internet Explorer\Quick Launch
Make sure that the location bar shows the full path and click okay. You’ll immediately notice the Quick Launch toolbar on the taskbar..."