Hey guys this is a wierd one for you, im Running Vista SP1, and im having problem's running video flash programs full screen such as bbc iplayer in which the audio crackles, but if i change resolution down to 800x600 it seems to reduce it by 95% and in a couple of games (Gears of war) which the sound also crackles on certain maps. I have reloaded the drivers, have the latest drivers and MS updates. any ideas?