I get the same exact thing and I'm on laptop..however only difference is, when I'm playing Xbox. When the Xbox is connected on the same network as laptop, the instant I turn off the Xbox, my Internet connection goes to poop as explained above. I've always had ffxiv open when I played Xbox and turned it off, but I don't think I've tested it with the game not running. I will make sure to do that, but it has happened when the game was up. OP have u shut anything down, Xbox, etc the could've caused the same issue as I explained?