I installed the steam version of Pso2 on a different pc in my house on launch day. I have a second pc in my living room and wanted to play it there, I installed the client and attempted to launch it. The launcher comes up, allows you to alter the configuration, but when you start the game, game guard pops up and then nothing happens. Game guard stays running in the background. After investigating, I found the game will launch again after you turn off steam cloud sync and re initialize the settings.