Hi i was at my dads work a few weeks ago and on his bosses PC adn i changed to the resolution (i dont think this is what cossed it but nayway) and then he gor a lil upset so i changed it back well he kept on saying Ian u messed up my fonts

so i askd him if i could look at it and whats wrong is.. (and this happens nomatter what website i go to) u know how some websites have were if u put the mouse button over a link a little thing pops out that like says whats in it?!?!?! and it shows the letters just fine but the backround of the pop out is clear.. so u can perty much see starit through it like a window? and im not sure if its the pc or not but if u want a screenshot i can get one and post it if u could help that would be great thanks,