[2020] Bitdefender seems to be blocking GW2 launcher.

[Problem solved]

Disabling the virus shield(not recommended) circumvents the block.

Part of the problem: https://imgur.com/VYtbvhF http://assetcdn.101.arenanetworks.com is being blocked, but I can't determine anything else, because Bitdefender free version users can't even add that link to a whitelist.

Edit: Changed blocked asset link to match known blocked scope.

Edit2: Problem solved, thanks in part to /u/Nightfall05!