before you go and do any crazy ****. look at the bottom of the page. do you have the tab for the chatrooms? close that **** out. had the same problem until i figured out it was the chatroom bar at the bottom
edit: looking at your pics you can see its the chatroom bar scattered up and down the screen. far right on the bar there is an arrow to close it. there will still be the chat bubble there that will still lag but it isnt nearly as bad as the entire bar.