We have three computers that run Guild Wars 2 and only one is experiencing lag issues. Ran speed test without GW2 running and with it on all computers. Only the one with lag issues dropped down when GW2 is active. It goes from 20Mbps to .8Mbps once GW2 is executed. I will occasionally go back to normal speeds then back down. All other computers in the same residence continually run at 20Mbps. This started today with the patch. All systems using windows 7 latest service packs, running the same anitvirus and going through the same router and ISP. There must have been an error in the patch for that computer. Internet is fine until GW2 is executed.