Network / Sharing :: Internet Disconnects When Trying To Play Certain Game

Well there's this game that uses HTTP protocol for everything. I built a new computer with Windows 8.1 Pro as my OS and whenever I try to play the game my internet ends up disconnecting. (connection from my computer to the router, the router itself doesn't disconnect)

This never happens with any other game, my internet never disconnects from anything else at all really. Whenever I open the game, try to download and view another user's replay or just in general try to do anything from within the game I end up disconnecting.

I'm using the exact same router/internet that I was using on my old computer (although a new network adapter, same model though) which was running W7 Ultimate. It's making playing the game very frustrating considering it needs an internet connection to officially submit any kind of scores you make.