I installed and began playing late yesterday [Central Time]. I was playing through the first Dream mission fine, when I got to the Ground Zero Flashback, the game became weird and non-responsive.
I used Task Manager to exit the game, and discovered that Windows Defender had quarantined many instances of one of the games files. When I attempted to start the game up again, it would not start, but AV detected and quarantined more instances of a game file, it considered to be a Trojan virus.
My OS is Windows 10, and I installed the game via Steam.