Aug 27 2011
It’s been brought to our attention that there are a number of issues relating to a new installation of Unity Connection 8.5. Various problems have been reported including the installation DVD failing a media check, the installation process hanging for 30 minutes or more, and various other crashes being reported.

We are currently trying to define a process for a smooth installation and will post back here when we’ve finished our testing. It may be worth going straight to the newest release – version 8.6, rather than going with 8.5.

This link gives a few more details.

Barry Hesk