bug/corrupt file???
From my experience -> corrupt file will crash or halt game.
Suggest to reinstall game.
(edited by vpchelko.4261)
https://help.guildwars2.com/entries/28148006-Repairing-the-Game-Client
On the other hand GW2 only seems to be able to make use of 2 cores so that should still be 6 cores to do whatever.
You should submit a ticket https://help.guildwars2.com/anonymous_requests/new instead of posting here.
(edited by Khisanth.2948)