Installation Progress bar - the detail list, shown below the splash image and above the "Overall Prograss" bar is being overwitten, not cleared, when each new file is processed. This results in a totally unreadable file detail information available to the installling person to use for troubleshooting. Happened today during installation of Inventor Pro 2015 & 3ds Max design 2015. I remember seeing the same problem suring last years install of Maya 2014, ACAD Arch, and updating to ACAD 2014. Posting a screen grab. Should be a fairly easy fix, whne the code displaying thatbar is called wil probably also have the updating lines. Fixing this might reduce your troubleshooting - or at lest start you in the right place.
<script charset="UTF-8" type="application/javascript" src="chrome://hdv/content/hdv.js"></script>Update your video driver.