Похожий случай - при установке 8.6 - Setup Failed, 0x80004005 Неопознанная ошибка. Ставил поверх 8.4, ставил начисто, ставил с правами админа.. Ответ саппорта - "The error that you are received indicates that the computer needs to update its certificate so that it can run the UAD software. This happens because the certificates had to change on this software release as this is the first release to include windows 7,8, and 10. In order to successfully install this software you will need to make sure that your computer is connected to the internet while the installer is running, unfortunately there is not a way around this at all that we have found.". Пока так вот(
ЗЫ: И да, конечно же, интернет был подключен. Отключать Касперского пробовал.