At last I was able to fix the problem with my Macbook’s fan running at full speed all the time. It turned out that it was the Canon IP1000 printer drivers. Solution, remove the driver and throw that printer out of the window.
Anyways, I cam across this Mac Ad, which is really so true. Just loved it, and couldn’t quit playing it over and over again. That security guy is hillarious… I just love those ads.