From June.18 to July.1, a hot-fix KB that related to System Center 2012 was released:

  • 2838585    FIX: A task sequence to install an operating system does not run when you use custom port settings in System Center Configuration Manager 2012 SP1
  • 2841592    FIX: A task sequence cannot download content from a Configuration Manager 2007 shared distribution point in System Center 2012 Configuration Manager SP1

Best Regards,

Raymond Teng