This is a problem dating back at least to August 2011 (posted by username 'tf44', post Aug 27 2011, 10:59 PM ). Vista SP2 gets to stage just before Win welcome screen then hangs with a black screen and mouse pointer, and is definitely a BD 2012 problem. Can start in Safe mode w/ network and do a restore; this allows reboot but with 'BD services unavailable'. A temporary fix is achieved by uninstall/install, but only until you make the mistake of powering off your machine. Can someone please do something as it is a problem still affecting people after at least 6 months into BD 2012 launch!