Windows 8/8.1 are not "new", although they are "the latest" and we certainly are confidant that Adagio runs well in those environments. I have had both 8 and 8.1 machine running Adagio without incident, and the machines we are buying for the office are all Windows 8 boxes.

This behaviour is common enough that we know it's a problem. However, at the moment, we don't know what is different about the machines where registry entries are not being written/reported properly. Perhaps it's a rights "thing". Or a trusted drive "thing". We're working to figure it out and, if we are unable to, we will adopt an alternative strategy to deal with Workstation installs.

That's a big job though, and one we'd rather not undertake until we've exhausted other possibilities.