For your resolution, delete all profile... make a new profile
if that doesnt work, uninstall the game xD.. if that doesnt work, its your TV/screen/cable
for perfomance if your having bad fps, just lower all settings.. close any apps, .exe , etc.. if your that desperate to get fps.. this works .. ctrl alt delete.. go in your Task manage... end process explorer.exe, now to get it back up.. you need to go "File" on top of the TM, click run.. type in explorer.exe
i had a bad pc aswell and the way i get 30fps in arma was doing this