I'm having this exact same problem and it occurred immediately after installing these two Windows 10 patches: February 11, 2020—KB4532693 (OS Builds 18362.657 and 18363.657)Security Update for Adobe Flash Player: February 11, 2020I'm skeptical that a Flash update would cause the issue, so I am looking at KB4532693 as the source of the problem. I have tried uninstalling it twice without success. The system goes through the motions telling me it's uninstalling, then getting updates ready, then asks me to reboot. I do that and the patch is still installed. My game was working perfectly fine prior to this patch. I've also tried reinstalling my video drivers (NVIDIA). I have also run a Gw2-64.exe -repair without getting any change in behavior. I am right now reinstalling the game cleanly using the installer offered on the website downloaded this evening (i.e.; it's not an old copy I had laying around). I am not expecting this to be the fix, but I am trying to be thorough. The sequence was that I was playing the game fine, then Windows said I needed to restart sometime to finish installing updates. I figured I'd get it over with right now so I quit the game, restarted, and when my PC came back, I now have this issue that @"Booey Bubblehead.4890" reports. I can start the game, login to the login dialog, get prompted for my 2FA code, and then when I click Play, I get a full screen (Window) that's white (I expect this) and after a couple seconds it minimizes to the task bar (I do not expect this, I expect to see my characters at this point). Clicking the icon to open the window does nothing. Hovering my mouse over the icon for a window preview gives me "window preview" that appears to be about 30 pixels wide and 1 pixel tall. I cannot quit the game other than by right clicking the icon and selecting Close Window, or using Windows Task Manager to kill it. Edit: The clean download has stalled at 93% complete for the past hour or so.