Arkham Knight still a complete mess on PC
The game went back on sale on PC yesterday evening and many players are still reporting problems. Warner Bros. has since released a blog post warning of a GPU issue for Windows 7 users which will cause a hard drive paging issue after "extended gameplay sessions." The solution offered is to simply relaunch the game.
Windows 10 users are recommended to have "at least 12GB of system RAM" if you are having problems. According to Warner Bros., this will allow the game "to operate without paging and provides a smoother gameplay experience."