My 2010 13.3/1.86/4GB/128GB MBA has slowed down of late and it struggles especially while running videos (youtube, vimeo, yahoo, netflix etc.) where the fans turns on and runs so fast and loudly I can barely hear the audio in the video. I don't stream videos on my Air because of this reason. Will doing a clean install of Mountain Lion help me? Or is the Core 2 Duo processor the problem here? Can ML bring back some of the old snappiness my MBA? Will it help with video playback?