I have the same problem on my laptop. Although I got a second problem as well. As soon as I run my GW2 launcher, it shows the launcher quickly (2 or 3 sec) and it disappears to the background. I can’t open the launcher again, but I can see it is downloading. The gw2.dat reaches a maximum of 16.9gb but it doesn’t finish the install. Does anyone have any clue if this is connected with this particular case?