hi im Korean user.. im no good in english sorry hahaha problem of bgbuddy... I start BGbuddy and enter a battle ground my FPS drops below 20 from 60 # set Wow.exe high priority... # try to use DX9 and DX11... # set lowest graphic option... window mode, full mode... # reinstall honorbuddy.. reinstall wow... reinstall OS...... (win8.1 to win7...) # disable all addons the above solution.. nothing can't fix it. [ to sum up ] select BGBuddy-> and click Start button -> enter a battle ground -> my character start to move. -> attack some enemy -> top-left corner shining black box (i dont know why..) -> my FPS drops below 20 from 60, very very high lag....