Up-Button in Windows 7 Explorer

Having been recently converted to Windows 7 one of the first thing I noticed is the lack of the “up” button in explorer. Since I have many shortcuts to frequently used directories, the “back” does not do the same thing in most cases. Fortunately, there is an easy shortcut key as I found out here:

Use ALT-(up arrow)

http://www.howtogeek.com/howto/windows-vista/up-keyboard-shortcut-for-windows-vista-explorer/

Unfortunately, ALT-(down arrow) does not bring you back again.