some programs seem to hang when you try and shut down.
if you have all windows and programs closed then it might be the antivirus or other background program. sometimes desktop widgets (win7) can cause a hang.
please list answers to:
-name of the program which hangs
-if you shut down with windows open (like word, firefox, other programs) or with nothing open
-if it has always done this or if this is a new development
-your windows version