Also, I'm not all that keen on the AA windows. I don't like using more than one navigation screen (like in 80's computer games) where a larger scope is given at the top. Also, the cursor seems to go off the screen sometimes and it's difficult to place markers when the audio position is right at the edges. I did select the option about it staying in the centre, but the cursor doesn't move the centre until it goes off screen which is annoying.
Anyway, the fix worked. I deleted the 'corrupt' file from Desktop with command prompt and the bone idle CPU went down to 0-5%.