I am having the same issue on my Lenovo T430 laptop. Firewalls disabled, all ports open. When I run the LOG version it does not create a log. When I try to uninstall it I get an error and it generates a crash.dmp (sent report to arenanet). Renaming my Gw2.dat file doesn’t work (it does recreate a new one but it is 0 bytes and still get error).
I eventually had to remove the GW2 entry at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall and I was able to run the setup without this error but I then got the “Download Failed! Please check your internet connection and try again”.
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