I can't install blizz in Windows 7 Professional. Window ''Preparing for the first start'' appears and then it goes off and installation won't start. I tried it many times but always the same.
Could you please collect log files with this tool https://community.teamviewer.com/t5/Knowledge-Base/Support-Collector/ta-p/35849 and send them in private message to me. You can also open support request here: https://www.blizz.com/en/submit-a-ticket/