I also get this pretty often now, mostly in conjunction with the energy save function of the shutdown button (not the regular energy safer), dunno the correct term in English. In former times it was called "hibernation". While it seems to work perfectly, after restarting the system ED runs fine but when shutting down the game now I get the black stream freeze very often, still need to check if not even always. Could be a hint for the devs why this happens so often as of late...They better fix this quit-only-thru-taskmanager malarkey. Really twisting my chuddies.