Thank you for replying, Jason. You correctly linked to the Botocamp update I was referring to. I assume that since this new Bootcamp version specifically addresses Windows 8.1, it must contain updated drivers that would be appropriate for my Windows 8.1.1 installation on an existing Bootcamp partition. I have previously read the instructions for Bootcamp but having read those and others they seem to apply to new installations rather than updating an existing installation. Are there no special steps necessary to update an existing Bootcamp installation or does one installation cover both updating and new, clean installs of Bootcamp?