I am not sure what is going on happens randomly and does not go away till i exit to main menu and start again. and if i hit tab it all goes back to normal till i hit tab again to not show scoreboard.
Try rolling back your video drivers. And/or making sure they are up to date and do a fresh install. Stuff like this is kind of hard to troubleshoot since it could always be a bunch of possibilities, but give that a shot first and let me know how it works out for you.
well i updated my video driver to beta and set my gpu thing to single gpu because i am running sli and it has not done it yet.