I'm using IE6 and it was working fine but al of a sudden the fonts on websites are huge how can i fix that ?

well, look into your display options in ie, there is a tab where you can change the font size...

Look here, it's in french but it's the same thing...

btw before i had some problems, sometimes every time i moved my mouse wheel, it didn't scrolled the page but it changed the font size :p