Just thought I would let you know we have found a way to fix this problem. If you look in the Windows Event Viewer there are lots of errors about set-up.dat (I have a copy of the Windows Event log if someone from Adobe would like to read them) when you try and install the Creative Cloud package (even if you try from the local machine). What my manager tried was copying the set-up.dat file from my previous Creative Cloud build that I made in May (so probably using the Creative Cloud packager 1.5 or earlier) into our current builds folder and the install works fine.
To me it appear that the Creative Cloud packager 1.6 and 1.7 are corrupting or malforming the set-up.dat file so if you are lucky enough to have an old Creative Cloud build sitting around somewhere you maybe able to copy the set-up.dat file from it into your new build folder and install like normal.