I finally figured out what the problem was, with just a slither of thanks to swat. I reinstalled windows and the game finally worked. On my old installation i checked the firewall again. I have not changed anything on my hardware and software setup. Rechecking my old installation i found the problem: The destiny.exe was blocked by the firewall of kaspersky. This had to have something to do with the latest update though! And before you tell me: Oh why haven't you tried deactivating the firewall in the first place? Well i did and the problem persisted, probably because bungie really had issues while i deactivated my firewall so that was not gonna resolve the server issues. After i listed the destiny.exe as a trusted software i could sign in immediatly. Question to bungie: Is this scenario known to you? I had similar sign in problems the last two weeks after your updates and each of that times, reinstalling the game once on wednesday and once on thursday after you released your updates the game worked again. I did not have to change firewall settings.