In the last week or so, some of my programmes have had some of the small icons changed. For example the movement buttons on the scroll bars have changed from a triangle to a blocked cube (horizontal bar) and an hour glass(vertical bar). Some of the pointed triangles on Menu lists have changed to what appears to be a light bulb with a piece of flex attached. Radio buttons have turned into something unrecognizable but look like a distorted letter ‘Q’. I have run NAV twice in the past week but nothing has been found amiss. I am running Windows XP. Can anyone please help me get back to normal?