Finder no longer works
I have a situation where the Finder no longer "works."
I can do many things with it, but cannot open a Finder window or display the contents of any folder (i.e. in a finder window).
Attempting to do so, "immediately" results in the spinning beach-ball effect, and "Force Quit" reporting -- "not Responding."
Relaunching clears the "not responding" but does not open or allow to open a window.
iMac, OS X Mountain Lion (10.8.2), iMac Core i7 2.93GHz 4GB