I hope someone could shed some information on what this issue is and what I could potentially do to resolve this annoyance. I've found in some games diagonal mouse movement moves like stairs,http://i.imgur.com/Oa4R5.png I have posted a short video that demonstrates the issue,https://www.youtube.com/watch?v=T7KVS15xNoA. It first started with Skyrim but happens in other games e.g. Metro 2033 and now Archeage. From what I can tell the issue happens more when the FPS dips below 60, but it's not a v-sync issue. I have tried changing the mouse so I know it's not that. Any help would be appreciated