Purchased and downloaded ES2 on Thursday May 25/17.  I start Endless Space 2  game via Steam,  initial screen appears, white bar near bottom of screen goes to 100% , audio occurs(music), screen never changes. I have tried all the tips and 'fixes" without success. I have installed and played games such as Doom, War Thunder, GW2, Witcher 3 with absolutely no issues. 

PC Report.7z   output_log.7z

It's Microsoft